Cross Reference: /ndk/sources/cxx-stl/llvm-libc++/test/strings/basic.string/string.modifiers/string_op_plus_equal

`Name`	`Date`	`Size`
Up to higher level directory
`char.pass.cpp`	25-Jul-2013	`851`
`initializer_list.pass.cpp`	25-Jul-2013	`683`
`pointer.pass.cpp`	25-Jul-2013	`1.6K`
`string.pass.cpp`	25-Jul-2013	`1.7K`