Apply version-script to libGLESv2 library

Hide unintentionally exported symbols, validate that symbols mentioned
in the map file are actually exported by the library.

Also add missing gl*Query*EXT symbols to the list. Part of them are
used by hwui unit tests. They were exported implicitly before, this
change make it explicit.

Bug: http://b/69603741
Test: make
Change-Id: Iac3b821477a4e88bd507596324a45c7afaf18ba6