frameworks/native: convert LOCAL_MODULE_PATH to LOCAL_MODULE_RELATIVE_PATH

LOCAL_MODULE_PATH doesn't work for multiarch builds, replace it
with LOCAL_MODULE_RELATIVE_PATH.

Change-Id: I4e4ceec61d026bbe74ba604554c06104bde42e5e
diff --git a/opengl/libagl/Android.mk b/opengl/libagl/Android.mk
index 9886bf0..95a8ef2 100644
--- a/opengl/libagl/Android.mk
+++ b/opengl/libagl/Android.mk
@@ -44,7 +44,7 @@
 # we need to access the private Bionic header <bionic_tls.h>
 LOCAL_C_INCLUDES += bionic/libc/private
 
-LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES)/egl
+LOCAL_MODULE_RELATIVE_PATH := egl
 LOCAL_MODULE:= libGLES_android
 
 include $(BUILD_SHARED_LIBRARY)