Add a test that checks multi-texturing works with GL_TEXTURE_EXTERNAL_OES

Bug: 8395618
Change-Id: I160d29699593b11058533ca753e275d5deeb3b54
diff --git a/libs/gui/tests/Android.mk b/libs/gui/tests/Android.mk
index 4a6f74f..21bd875 100644
--- a/libs/gui/tests/Android.mk
+++ b/libs/gui/tests/Android.mk
@@ -15,6 +15,7 @@
 
 LOCAL_SHARED_LIBRARIES := \
 	libEGL \
+	libGLESv1_CM \
 	libGLESv2 \
 	libbinder \
 	libcutils \