Fix spurious -lSHARED linker error in guile-uuid target

[Copilot]

TARGET_LINK_LIBRARIES does not accept SHARED as a visibility keyword (valid: PUBLIC/PRIVATE/INTERFACE). CMake treated it as a library name, causing the linker to fail with cannot find -lSHARED.

Change

opencog/persist/tlb/CMakeLists.txt — remove the spurious SHARED keyword:

# Before
TARGET_LINK_LIBRARIES(guile-uuid SHARED
    tlb ...)

# After
TARGET_LINK_LIBRARIES(guile-uuid
    tlb ...)

[drzo]

cooool