Migrate libGLESv2 to ndk_library.

Test: make checkbuild
Bug: http://b/30465923
Change-Id: I62e108bdd27b6dc40fdf7ede7d579a286cbf3b9b
diff --git a/opengl/libs/Android.bp b/opengl/libs/Android.bp
index 367a6e9..66501dc 100644
--- a/opengl/libs/Android.bp
+++ b/opengl/libs/Android.bp
@@ -33,3 +33,9 @@
     symbol_file: "libGLESv1_CM.map.txt",
     first_version: "9",
 }
+
+ndk_library {
+    name: "libGLESv2.ndk",
+    symbol_file: "libGLESv2.map.txt",
+    first_version: "9",
+}