omni: dont add gapps backup script to MICROG and GAPPS builds

Change-Id: Ic7da5bae0fd4b6253700d7dcec3f20855b0b57f4
diff --git a/config/common.mk b/config/common.mk
index 351fc52..c94f69c 100644
--- a/config/common.mk
+++ b/config/common.mk
@@ -46,8 +46,11 @@
 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
+ifeq ($(filter $(ROM_BUILDTYPE), GAPPS MICROG),)
+PRODUCT_COPY_FILES += \
     vendor/omni/prebuilt/addon.d/69-gapps.sh:system/addon.d/69-gapps.sh
+endif
 else
 PRODUCT_COPY_FILES += \
     vendor/omni/prebuilt/bin/backuptool.sh:system/bin/backuptool.sh \