[asan] Fix the atos-symbolizer-dyld-root-path.cc test case

Due to a typo, atos-symbolizer-dyld-root-path.cc is currently being skipped all the time. There's a few more typos/copy-paste-errors. Let's fix them and enable this test.

Differential Revision: http://reviews.llvm.org/D14951

llvm-svn: 254058