Don't use empty space after variable in Android makefile

In Android makefile, we always assign a value to a variable. But if we add one or more empty space after variable value, it may cause some build error. For example, If we want to add a preinstall apk to system, we may use makefile template such as below: LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE := LeanbackSampleApp LOCAL_SRC_FILES := $(LOCAL_MODULE).apk LOCAL_MODULE_CLASS := APPS LOCAL_MODULE_TAGS := optional LOCAL_MODULE_SUFFIX := $(COMMON_ANDROID_PACKAGE_SUFFIX) LOCAL_CERTIFICATE := platform include $(BUILD_PREBUILT) Above makefile template is copied from AOSP. The template is simply, but if we add...