[sanitizer] Support GLOB_ALTDIRFUNC in glob interceptor.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@185932 91177308-0d34-0410-b5e6-96231b3b80d8
[sanitizer] Update glob64 interceptor to handle GLOB_ALTDIRFUNC as well.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@185935 91177308-0d34-0410-b5e6-96231b3b80d8