Build tweaks for Android

Author: drwasho

Makefile

@@ -26,7 +26,7 @@ ios_framework: ## Build iOS Framework for mobile
 
 .PHONY: android_framework
 android_framework: ## Build Android Framework for mobile
-	gomobile bind -target=android github.com/OpenBazaar/openbazaar-go/mobile
+	gomobile bind -target=android/arm,android/arm64,android/amd64 -ldflags="-s -w" github.com/OpenBazaar/openbazaar-go/mobile
 
 ##
 ## Protobuf compilation