Migrate libGLESv1_CM to ndk_library.

Test: make checkbuild
Bug: http://b/30465923
Change-Id: Icd83a5ef5d6afcde9441f49de14a8e645d15da2f
diff --git a/opengl/Android.bp b/opengl/Android.bp
index 1d511f2..a21d6de 100644
--- a/opengl/Android.bp
+++ b/opengl/Android.bp
@@ -19,6 +19,13 @@
     srcs: ["include/EGL/**/*.h"],
 }
 
+ndk_headers {
+    name: "libGLESv1_CM_headers",
+    from: "include",
+    to: "",
+    srcs: ["include/GLES/**/*.h"],
+}
+
 subdirs = [
     "*",
 ]