Bug 793053 - Part 0a: add ANDROID_CPU_ARCH to Makefile.in. r=gps

mobile/android/base/Makefile.in

@@ -244,6 +244,7 @@ UA_BUILDID=$(shell echo $(ANDROID_VERSION_CODE) | cut -c1-8)
 DEFINES += \
   -DMANGLED_ANDROID_PACKAGE_NAME=$(subst fennec,f3nn3c,$(ANDROID_PACKAGE_NAME)) \
   -DANDROID_PACKAGE_NAME=$(ANDROID_PACKAGE_NAME) \
+  -DANDROID_CPU_ARCH=$(ANDROID_CPU_ARCH) \
   -DMOZ_APP_DISPLAYNAME="$(MOZ_APP_DISPLAYNAME)" \
   -DMOZ_APP_NAME=$(MOZ_APP_NAME) \
   -DMOZ_APP_VERSION=$(MOZ_APP_VERSION) \