So that there will be one instance of static thread synchronization variables
in AndroidWindow.
Previously there was one instance in lib_angle_deqp_gles2_tests__library
and one in libangle_deqp_libgles2, resulting in AndroidWindow::initialize
waiting forever.

Also make the change in GYP build to fix standalone build,
and fix rpath issues on Mac.

BUG=angleproject:1471
TEST=end2end and deqp tests on standalone Win10 and end2end on GN Mac 10.11

Change-Id: I731578459400bb47d269df129aabed9b67b555e6
Reviewed-on: https://chromium-review.googlesource.com/376202Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>