Be sure to include the EIO sources as well so we can run regression tests.

src/SConscript:
    It's no longer "ALPHA_ISA".  I don't think we meant to leave out the EIO sources.

--HG--
extra : convert_revision : 1ca63ffb571d9021f1ced0bf0df1816b0b798edc

src/SConscript

@@ -298,7 +298,7 @@ alpha_eio_sources = Split('''
 	encumbered/eio/eio.cc
         ''')
 
-if env['TARGET_ISA'] == 'ALPHA_ISA':
+if env['TARGET_ISA'] == 'alpha':
     syscall_emulation_sources += alpha_eio_sources
     
 memtest_sources = Split('''