test(matrix): the two ARMv7-A rows, on every host the table declares

⚠️⚠️ THE SUPPORT MATRIX IS A DECLARATION, AND ADDING A TARGET ROW WITHOUT
ADDING IT HERE IS A RED SCAN RATHER THAN A SILENT GAP — which is what the table
is for. `scan (linux-aarch64)` reported the two new targets as measured cells
with no expectation.

Twelve cells: four hosts × the compilers each declares. The shape follows the
M-profile rows exactly, because the answer is the same one — llvm serves them
from a payload that needs no per-host cross build, and every gcc/msvc cell is a
`capability-pin` refusal.

Measured locally on linux-x86_64: 42/42 payload and 16/16 graph cells match.

Author: speak-agent

tests/matrix/expected.tsv

@@ -99,6 +99,8 @@ payload	linux-aarch64	thumbv7m-none-eabi	gcc@16.1.0	-	-	-	-	-	unsupported	capabi
 payload	linux-aarch64	thumbv8m.base-none-eabi	gcc@16.1.0	-	-	-	-	-	unsupported	capability-pin
 payload	linux-aarch64	thumbv8m.main-none-eabi	gcc@16.1.0	-	-	-	-	-	unsupported	capability-pin
 payload	linux-aarch64	thumbv8m.main-none-eabihf	gcc@16.1.0	-	-	-	-	-	unsupported	capability-pin
+payload	linux-aarch64	armv7a-none-eabi	gcc@16.1.0	-	-	-	-	-	unsupported	capability-pin
+payload	linux-aarch64	armv7a-none-eabihf	gcc@16.1.0	-	-	-	-	-	unsupported	capability-pin
 payload	linux-aarch64	x86_64-linux-musl	gcc@16.1.0	-	-	-	-	-	unsupported	host-cannot-serve
 payload	linux-aarch64	x86_64-macos	gcc@16.1.0	-	-	-	-	-	unsupported	tier-planned
 payload	linux-aarch64	x86_64-none-elf	gcc@16.1.0	-	-	-	-	-	unsupported	capability-pin
@@ -128,7 +130,11 @@ payload	linux-x86_64	thumbv8m.base-none-eabi	llvm@22.1.8	thumbv8m.base-none-eabi
 payload	linux-x86_64	thumbv8m.main-none-eabi	gcc@16.1.0	-	-	-	-	-	unsupported	capability-pin
 payload	linux-x86_64	thumbv8m.main-none-eabi	llvm@22.1.8	thumbv8m.main-none-eabi	payload	-	-	-	ok	none
 payload	linux-x86_64	thumbv8m.main-none-eabihf	gcc@16.1.0	-	-	-	-	-	unsupported	capability-pin
+payload	linux-x86_64	armv7a-none-eabi	gcc@16.1.0	-	-	-	-	-	unsupported	capability-pin
+payload	linux-x86_64	armv7a-none-eabihf	gcc@16.1.0	-	-	-	-	-	unsupported	capability-pin
 payload	linux-x86_64	thumbv8m.main-none-eabihf	llvm@22.1.8	thumbv8m.main-none-eabihf	payload	-	-	-	ok	none
+payload	linux-x86_64	armv7a-none-eabi	llvm@22.1.8	armv7a-none-eabi	payload	-	-	-	ok	none
+payload	linux-x86_64	armv7a-none-eabihf	llvm@22.1.8	armv7a-none-eabihf	payload	-	-	-	ok	none
 payload	linux-x86_64	x86_64-linux-gnu	gcc@16.1.0	x86_64-unknown-linux-gnu	subos	gnu(payload)	libstdc++(payload)	-	ok	none
 payload	linux-x86_64	x86_64-linux-gnu	llvm@22.1.8	x86_64-unknown-linux-gnu	payload	gnu(payload)	libc++(payload)	-	ok	none
 payload	linux-x86_64	x86_64-linux-musl	gcc@16.1.0	x86_64-unknown-linux-musl	payload	musl(payload)	libstdc++(payload)	-	ok	none
@@ -155,6 +161,8 @@ payload	macos-arm64	thumbv7m-none-eabi	llvm@22.1.8	thumbv7m-none-eabi	host	-	-	-
 payload	macos-arm64	thumbv8m.base-none-eabi	llvm@22.1.8	thumbv8m.base-none-eabi	host	-	-	-	ok	none
 payload	macos-arm64	thumbv8m.main-none-eabi	llvm@22.1.8	thumbv8m.main-none-eabi	host	-	-	-	ok	none
 payload	macos-arm64	thumbv8m.main-none-eabihf	llvm@22.1.8	thumbv8m.main-none-eabihf	host	-	-	-	ok	none
+payload	macos-arm64	armv7a-none-eabi	llvm@22.1.8	armv7a-none-eabi	host	-	-	-	ok	none
+payload	macos-arm64	armv7a-none-eabihf	llvm@22.1.8	armv7a-none-eabihf	host	-	-	-	ok	none
 payload	macos-arm64	x86_64-linux-musl	llvm@22.1.8	-	-	-	-	-	unsupported	convention-unreplaced
 payload	macos-arm64	x86_64-macos	llvm@22.1.8	-	-	-	-	-	unsupported	tier-planned
 payload	macos-arm64	x86_64-none-elf	llvm@22.1.8	x86_64-none-elf	host	-	-	-	ok	none
@@ -185,7 +193,11 @@ payload	windows-x86_64	thumbv8m.base-none-eabi	msvc@system	-	-	-	-	-	unsupported
 payload	windows-x86_64	thumbv8m.main-none-eabi	llvm@22.1.8	thumbv8m.main-none-eabi	none	-	-	-	ok	none
 payload	windows-x86_64	thumbv8m.main-none-eabi	msvc@system	-	-	-	-	-	unsupported	capability-pin
 payload	windows-x86_64	thumbv8m.main-none-eabihf	llvm@22.1.8	thumbv8m.main-none-eabihf	none	-	-	-	ok	none
+payload	windows-x86_64	armv7a-none-eabi	llvm@22.1.8	armv7a-none-eabi	none	-	-	-	ok	none
+payload	windows-x86_64	armv7a-none-eabihf	llvm@22.1.8	armv7a-none-eabihf	none	-	-	-	ok	none
 payload	windows-x86_64	thumbv8m.main-none-eabihf	msvc@system	-	-	-	-	-	unsupported	capability-pin
+payload	windows-x86_64	armv7a-none-eabi	msvc@system	-	-	-	-	-	unsupported	capability-pin
+payload	windows-x86_64	armv7a-none-eabihf	msvc@system	-	-	-	-	-	unsupported	capability-pin
 payload	windows-x86_64	x86_64-linux-musl	llvm@22.1.8	-	-	-	-	-	unsupported	convention-unreplaced
 payload	windows-x86_64	x86_64-linux-musl	msvc@system	-	-	-	-	-	unsupported	convention-unreplaced
 payload	windows-x86_64	x86_64-macos	llvm@22.1.8	-	-	-	-	-	unsupported	tier-planned