[MIPS] Support for building tests for MIPS

tests/gdb/nacl.scons

Index: tests/gdb/nacl.scons
diff --git a/tests/gdb/nacl.scons b/tests/gdb/nacl.scons
index fe7ff9531e9c2c711e15a3c5518b9fdfd673c685..1185e297ea99647cf008037c0b9bb75afd94afff 100644
--- a/tests/gdb/nacl.scons
+++ b/tests/gdb/nacl.scons
@@ -8,12 +8,12 @@ Import('env')
 if 'TRUSTED_ENV' not in env:
   Return()
 
-if env.Bit('target_arm'):
+if env.Bit('target_arm') or env.Bit('target_mips32'):
   if env.UsingEmulator():
-    # These tests do not work under qemu-arm.
+    # These tests do not work under qemu.
     Return()
-  # Use the system's ARM GDB because the NaCl toolchain does not
-  # include a copy of GDB built to run on ARM.
+  # Use the system's ARM/MIPS GDB because the NaCl toolchain does not
+  # include a copy of GDB built to run on ARM/MIPS.
   env.Replace(GDB='gdb')
   # Unlike nacl-gdb, the system version of GDB does not support the
   # "nacl-irt" command.
@@ -95,7 +95,7 @@ node = env.CommandTest(
 # TODO(mseaborn): Investigate and enable this test.
 # http://code.google.com/p/nativeclient/issues/detail?id=3252
 env.AddNodeToTestSuite(node, test_suites, 'run_gdb_stack_trace_test',
-                       is_broken=env.Bit('bitcode') and env.Bit('target_arm'))
+                       is_broken=env.Bit('bitcode'))
 env.TestBindsFixedTcpPort(node)
 
 node = env.CommandTest(
@@ -127,7 +127,7 @@ node = env.CommandTest(
 # TODO(mseaborn): Investigate and enable this test.
 # http://code.google.com/p/nativeclient/issues/detail?id=3252
 env.AddNodeToTestSuite(node, test_suites, 'run_gdb_change_variable_test',
-                       is_broken=env.Bit('bitcode') and env.Bit('target_arm'))
+                       is_broken=env.Bit('bitcode'))
 env.TestBindsFixedTcpPort(node)
 
 if not env.Bit('nacl_static_link'):