Add targets for building instrumented libraries related to libX11.

Patch by Alexander Taran (alextaran@chromium.org), reviewed at https://codereview.chromium.org/70193007/

BUG=313751
TBR=cpu@chromium.org,thakis@chromium.org,alextaran@chromium.org

Review URL: https://codereview.chromium.org/109073003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239754 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 239754