This change modifies the build to fix compile and link failures. It introduces a build/common_untrusted.gypi file, to add things that are needed by all untrusted targets that build Chrome code.
BUG=116317
TEST=compiles native_client.gyp:nacl_ipc_irt target on ARM.
Review URL: https://chromiumcodereview.appspot.com/10871009
git-svn-id: http://src.chromium.org/svn/trunk/src/build@153074 4ff67af0-8c30-449e-8e8b-ad334ec8d88c