[NaCl SDK] Fix typo in build_sdk.py.

The name of the gyp variable for disabling arm
components was mis-typed.

R=binji@chromium.org

Review URL: https://codereview.chromium.org/435813002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@287516 0039d316-1c4b-4281-b951-d872f2087c98

native_client_sdk/src/build_tools/build_sdk.py

@@ -526,7 +526,7 @@ def GypNinjaBuild(arch, gyp_py_script, gyp_file, targets,
       if force_arm_gcc:
         gyp_defines.append('nacl_enable_arm_gcc=1')
       if options.no_arm_trusted:
-        gyp_defines.append('disable_arm_trusted=1')
+        gyp_defines.append('disable_cross_trusted=1')
   if getos.GetPlatform() == 'mac':
     gyp_defines.append('clang=1')