Add filename and is_sentinel in ASM

Now ASM blocks stores the filename where they were declared
and whether they are "sentinel" (automagic) asm regions
or not.

Author: boriel

src/symbols/asm.py

@@ -15,7 +15,9 @@
 class SymbolASM(Symbol):
     """ Defines an ASM sentence
     """
-    def __init__(self, asm, lineno):
-        super(SymbolASM, self).__init__()
+    def __init__(self, asm: str, lineno: int, filename: str, is_sentinel: bool = False):
+        super().__init__()
         self.asm = asm
         self.lineno = lineno
+        self.filename = filename
+        self.is_sentinel = is_sentinel