Update scripts for testing ALPHA_FS and MIPS_SE.

Update scripts for testing ALPHA_FS and MIPS_SE.
Minor fixes to ALPHA_FS and SPARC_SE.
SPARC_SE still does not compile... looks like there
are unresolved issues with ExecContext -> ThreadContext
rename/reorg.

configs/test/fs.py:
    Port to new script interface/model.
configs/test/test.py:
    Add support for running MIPS test(s) too via
    command-line option.
src/arch/alpha/ev5.cc:
    Fix include file.
src/arch/sparc/regfile.hh:
    Make Bit64 a ULL constant to avoid compiler error.

--HG--
extra : convert_revision : c46c179758271c4f00171faaa579915846bf4624