[NaCl SDK] Re-enable 32-bit sel_ldr build for mac

native_client_sdk/src/build_tools/test_sdk.py

Index: native_client_sdk/src/build_tools/test_sdk.py
diff --git a/native_client_sdk/src/build_tools/test_sdk.py b/native_client_sdk/src/build_tools/test_sdk.py
index a2994fa8b6fd9bc5b9191448b71edc98960559f7..3a3c8ffa7e0026e73888e422969cf3670b9aded0 100755
--- a/native_client_sdk/src/build_tools/test_sdk.py
+++ b/native_client_sdk/src/build_tools/test_sdk.py
@@ -101,12 +101,11 @@ def StepRunSelLdrTests(pepperdir, sanitizer):
                                        args=args + ['run'])
 
   if getos.GetPlatform() == 'win':
-    # On win32 we only support running on the system
-    # arch
+    # On win32 we only support running on the system arch
     archs = (getos.GetSystemArch('win'),)
   elif getos.GetPlatform() == 'mac':
-    # We only ship 64-bit version of sel_ldr on mac.
-    archs = ('x86_64',)
+    # On mac we can run both 32 and 64-bit
+    archs = ('x86_64', 'x86_32')
   else:
     # On linux we can run both 32 and 64-bit, and arm (via qemu)
     archs = ('x86_64', 'x86_32', 'arm')