[sanitizer] Intercept mbtowc, mbrtowc, get_current_dir_name.

Move getcwd to common interceptors.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@185424 91177308-0d34-0410-b5e6-96231b3b80d8
[sanitizer] Fix GLOB_NOMATCH behaviour and refactor the interceptor a bit.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@185428 91177308-0d34-0410-b5e6-96231b3b80d8
[msan] Intercept mempcpy, wmempcpy.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@185431 91177308-0d34-0410-b5e6-96231b3b80d8
[sanitizer] Fix Android build.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@185432 91177308-0d34-0410-b5e6-96231b3b80d8