android源码添加新module遇到ach module must use a LOCAL_MODULE_TAGS错误
单编新加的module出现如下错误：
*** Module name: libril-cwm-2g
*** Makefile location: hardware/ril/libril-cwm-2g*
* Each module must use a LOCAL_MODULE_TAGS in its
* Android.mk. Possible tags declared by a module:
*
* optional, debug, eng, tests, samples
*
* If the module is expected to be in all builds
* of a product, then it should use the
* "optional" tag:
*
* Add "LOCAL_MODULE_TAGS := optional" in the
* Android.mk for the affected module, and add
* the LOCAL_MODULE value for that component
* into the PRODUCT_PACKAGES section of product
* makefile(s) where it's necessary, if
* appropriate.
*
* If the component should be in EVERY build of ALL
* products, then add its LOCAL_MODULE value to the
* PRODUCT_PACKAGES section of
* build/target/product/core.mk
*
*** user tag detected on new module - user tags are only supported on legacy modules。 停止。
解决办法：修改新加module的Android.mk文件，添加LOCAL_MODULE和LOCAL_MODULE_TAGS项即可