Revert "vendor: remove our old gapps backup script"

This reverts commit 17440c47b5b86fa6f91f3d57d92eeb7a1b8f092a.

Reason for revert:  
dont break backup yet

Change-Id: I33ad8aaf93b19ac70998625ba660c2eafc6b001c
diff --git a/config/common.mk b/config/common.mk
index e21db11..351fc52 100644
--- a/config/common.mk
+++ b/config/common.mk
@@ -46,7 +46,8 @@
 PRODUCT_COPY_FILES += \
     vendor/omni/prebuilt/common/bin/backuptool_ab.sh:system/bin/backuptool_ab.sh \
     vendor/omni/prebuilt/common/bin/backuptool_ab.functions:system/bin/backuptool_ab.functions \
-    vendor/omni/prebuilt/common/bin/backuptool_postinstall.sh:system/bin/backuptool_postinstall.sh
+    vendor/omni/prebuilt/common/bin/backuptool_postinstall.sh:system/bin/backuptool_postinstall.sh \
+    vendor/omni/prebuilt/addon.d/69-gapps.sh:system/addon.d/69-gapps.sh
 else
 PRODUCT_COPY_FILES += \
     vendor/omni/prebuilt/bin/backuptool.sh:system/bin/backuptool.sh \