[Android] Remove "All" target.
[Android] Remove "All" target.

It was added with commit 6863ff1b ("Bump crosswalk to Chromium
34.0.1809.2"), but it is not used anywhere (the `xwalk` target it
depended on does not even work on Android).

darktears/crosswalk,xzhan96/crosswalk,baleboy/crosswalk,hgl888/crosswalk,darktears/crosswalk,heke123/crosswalk,dreamsxin/crosswalk,hgl888/crosswalk,xzhan96/crosswalk,lincsoon/crosswalk,xzhan96/crosswalk,crosswalk-project/crosswalk,baleboy/crosswalk,axinging/crosswalk,rakuco/crosswalk,lincsoon/crosswalk,axinging/crosswalk,rakuco/crosswalk,rakuco/crosswalk,lincsoon/crosswalk,crosswalk-project/crosswalk,PeterWangIntel/crosswalk,crosswalk-project/crosswalk,dreamsxin/crosswalk,hgl888/crosswalk,heke123/crosswalk,lincsoon/crosswalk,baleboy/crosswalk,baleboy/crosswalk,xzhan96/crosswalk,crosswalk-project/crosswalk,crosswalk-project/crosswalk,axinging/crosswalk,xzhan96/crosswalk,rakuco/crosswalk,lincsoon/crosswalk,lincsoon/crosswalk,lincsoon/crosswalk,dreamsxin/crosswalk,baleboy/crosswalk,heke123/crosswalk,lincsoon/crosswalk,rakuco/crosswalk,dreamsxin/crosswalk,PeterWangIntel/crosswalk,hgl888/crosswalk,xzhan96/crosswalk,darktears/crosswalk,darktears/crosswalk,hgl888/crosswalk,crosswalk-project/crosswalk,baleboy/crosswalk,hgl888/crosswalk,baleboy/crosswalk,dreamsxin/crosswalk,darktears/crosswalk,xzhan96/crosswalk,heke123/crosswalk,axinging/crosswalk,PeterWangIntel/crosswalk,heke123/crosswalk,hgl888/crosswalk,rakuco/crosswalk,darktears/crosswalk,crosswalk-project/crosswalk,crosswalk-project/crosswalk,darktears/crosswalk,darktears/crosswalk,heke123/crosswalk,baleboy/crosswalk,hgl888/crosswalk,dreamsxin/crosswalk,rakuco/crosswalk,rakuco/crosswalk,axinging/crosswalk,heke123/crosswalk,PeterWangIntel/crosswalk,PeterWangIntel/crosswalk,xzhan96/crosswalk,PeterWangIntel/crosswalk,dreamsxin/crosswalk,axinging/crosswalk,PeterWangIntel/crosswalk,heke123/crosswalk,axinging/crosswalk