display: Change LOCAL_MODULE_PATH to LOCAL_MODULE_RELATIVE_PATH

To comply with multi-arch build system changes for 64-bit support,
LOCAL_MODULE_RELATIVE_PATH needs to be used.

Drop explicit use of LOCAL_MODULE_PATH as its not needed, and
causes build system to overwrite one of multi-arch library
variants with the other arch variant.

Change-Id: I882de72ad2003f1e2bcc93fb63bad7377a84d31d
diff --git a/libgralloc/Android.mk b/libgralloc/Android.mk
index 18beaf2..412f1be 100644
--- a/libgralloc/Android.mk
+++ b/libgralloc/Android.mk
@@ -18,7 +18,7 @@
 include $(CLEAR_VARS)
 
 LOCAL_MODULE                  := gralloc.$(TARGET_BOARD_PLATFORM)
-LOCAL_MODULE_PATH             := $(TARGET_OUT_SHARED_LIBRARIES)/hw
+LOCAL_MODULE_RELATIVE_PATH    := hw
 LOCAL_MODULE_TAGS             := optional
 LOCAL_C_INCLUDES              := $(common_includes) $(kernel_includes)
 LOCAL_SHARED_LIBRARIES        := $(common_libs) libmemalloc libqdMetaData