GitLab

Add a strip script based on the old build_nacl_irt.py (just keep strip piece)
Rename nacl_irt target to nacl_irt_unstripped and add a new target called
nacl_irt which strips the previous target.
Review URL: http://codereview.chromium.org/8539039

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@109764 0039d316-1c4b-4281-b951-d872f2087c98