Fix build breakage on ARM by removing IA32 flags

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@388 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

SConstruct

@@ -53,7 +53,7 @@ LIBRARY_FLAGS = {
       'CPPDEFINES':   ['ENABLE_DISASSEMBLER', 'DEBUG']
     },
     'mode:release': {
-      'CCFLAGS':      ['-O9', '-mtune=nocona', '-march=pentium']
+      'CCFLAGS':      ['-O9']
     },
     'wordsize:64': {
       'CCFLAGS':      ['-m32'],
@@ -188,7 +188,7 @@ SAMPLE_FLAGS = {
       'LINKFLAGS':    ['-m32']
     },
     'mode:release': {
-      'CCFLAGS':      ['-O2', '-mtune=nocona', '-march=pentium']
+      'CCFLAGS':      ['-O2']
     },
     'mode:debug': {
       'CCFLAGS':      ['-g', '-O0']