[msan] Intercept dl_iterate_phdr.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@182004 91177308-0d34-0410-b5e6-96231b3b80d8
[asan] symbolize when possible, even if ASAN_SYMBOLIZER_PATH is not provided. On Linux this will use dl_iterate_phdr instead of /proc/self/maps, even if the symbolizer is not installed

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@182005 91177308-0d34-0410-b5e6-96231b3b80d8
[sanitizer] fix gcc build

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@182006 91177308-0d34-0410-b5e6-96231b3b80d8
[ASan] Fix interface_symbols_darwin to pass a correct flag to nm.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@182008 91177308-0d34-0410-b5e6-96231b3b80d8