[asan] Replace rand_r with rand in test.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@201548 91177308-0d34-0410-b5e6-96231b3b80d8
[CMake] Check for -fPIE and -ffreestanding flags for consistency

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@201549 91177308-0d34-0410-b5e6-96231b3b80d8
Drop test/asan/GenericConfig directory

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@201552 91177308-0d34-0410-b5e6-96231b3b80d8