mm-drivers: sync: export sync_fence module symbols

This change updates makefile to export sync_fence
module symbols, so these can be imported by other
external kernel modules.

Change-Id: Idd64fae8f8797cbcb4b4012666ed5621fa83062f
Signed-off-by: Christina Oliveira <[email protected]>

sync_fence/Android.mk

@@ -18,6 +18,15 @@ KBUILD_OPTIONS := SYNC_FENCE_ROOT=$(SYNC_FENCE_BLD_DIR)
 KBUILD_OPTIONS += MODNAME=sync_fence
 KBUILD_OPTIONS += BOARD_PLATFORM=$(TARGET_BOARD_PLATFORM)
 
+###########################################################
+include $(CLEAR_VARS)
+LOCAL_SRC_FILES           := $(wildcard $(LOCAL_PATH)/**/*) $(wildcard $(LOCAL_PATH)/*)
+LOCAL_MODULE              := sync-fence-module-symvers
+LOCAL_MODULE_STEM         := Module.symvers
+LOCAL_MODULE_KBUILD_NAME  := Module.symvers
+LOCAL_MODULE_PATH         := $(KERNEL_MODULES_OUT)
+
+include $(DLKM_DIR)/Build_external_kernelmodule.mk
 ###########################################################
 include $(CLEAR_VARS)
 LOCAL_SRC_FILES   := $(wildcard $(LOCAL_PATH)/**/*) $(wildcard $(LOCAL_PATH)/*)