Disallow using stlport.
Disallow using stlport.

The only remaining users of stlport are vendor blobs. Prevent any new
users from using it.

Bug: http://b/15193147
Change-Id: I577a16c8c52e2c7d939c3b5026e18ad90e4b9f26
(cherry picked from commit 3a360a7353034be89cbcbb24296c7ae30e6b0ef2)

xorware/android_build,xorware/android_build,xorware/android_build,xorware/android_build,xorware/android_build