Updates to isa parser to make it see dependencies properly with the new scanner.

Updates to isa parser to make it see dependencies properly with the new scanner.

arch/alpha/isa/main.isa:
    Use automatic path includes thanks to updates to isa parser.
arch/isa_parser.py:
    Pull changes to isa parser from newmem into m5.  This fixes a bug where the files include in main.isa were not being included as dependencies properly.

--HG--
extra : convert_revision : 8ef1e2e1a64e7a5762baf7a09abc8665d7c2f688