[MIPS] Add remaining parts for building tests for MIPS

tests/callingconv/nacl.scons

Index: tests/callingconv/nacl.scons
diff --git a/tests/callingconv/nacl.scons b/tests/callingconv/nacl.scons
index d59b86aa7477aadfe1fa66ddde604b83075ff8c8..9ae002c527e832e768e5676ca6d1e05392580b17 100644
--- a/tests/callingconv/nacl.scons
+++ b/tests/callingconv/nacl.scons
@@ -9,6 +9,10 @@ Import('env')
 if env.Bit('bitcode') and env.Bit('pnacl_generate_pexe'):
   Return()
 
+# TODO(petarj): Add nacl-gcc for MIPS.

[Mark Seaborn, 2013/02/13 22:14:09]

I doubt you plan to do this. :-)  Maybe instead say "This test is disabled for
MIPS because we do not have a MIPS-enabled nacl-gcc to test PNaCl against."

Same for the other callingconv files.

[petarj, 2013/03/05 17:50:04]

Done.

+if env.Bit('target_mips32'):
+  Return()
+
 # If this test is failing on the bots, you can find the seed
 # from the output of the bot. Look for "--seed=".
 # To reproduce the exact problem, set settings['seed'] below