Fix definition of the __sanitizer_passwd structure on FreeBSD

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@205290 91177308-0d34-0410-b5e6-96231b3b80d8
Add FreeBSD support to sanitizers' procmaps facilities

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@205291 91177308-0d34-0410-b5e6-96231b3b80d8