[asan] require __i686__ for the SSE test; also make weaker claims about stack buffer overflows in another test

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@196373 91177308-0d34-0410-b5e6-96231b3b80d8
[asan] revert 196373: committed to many files by mistake

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@196374 91177308-0d34-0410-b5e6-96231b3b80d8
[asan] require __i686__ for the SSE test; also make weaker claims about stack buffer overflows in another test

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@196375 91177308-0d34-0410-b5e6-96231b3b80d8