[sanitizer] Minor fixes in sanitizer_common tests.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@181786 91177308-0d34-0410-b5e6-96231b3b80d8
[sanitizer] LibraryNameIs in sanitizer_linux

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@181787 91177308-0d34-0410-b5e6-96231b3b80d8
Add sanitizer syscall hooks to the tool's export lists.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@181790 91177308-0d34-0410-b5e6-96231b3b80d8