Group libraries when linking with gcc.

In order to make the gcc nacl build behave more like
VS we group all libraries within a --start-group/--end-group

BUG=155093

Review URL: https://codereview.chromium.org/11086056

git-svn-id: https://nativeclient-sdk.googlecode.com/svn/trunk/src@1442 050acbb0-2703-11df-ab0a-9f3f633ae91d
3 files changed