[x86] make assertions less strict in avx512f test file
[x86] make assertions less strict in avx512f test file

I'm not sure why yet, but there may be differences depending on the host?


git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@314158 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang