[analyzer] Use "issue hash" in CmpRuns; followup on r158180
[analyzer] Use "issue hash" in CmpRuns; followup on r158180

(For the future: It would be more efficient to produce a hash key with
the embedded function info inside the compiler.)

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@158187 91177308-0d34-0410-b5e6-96231b3b80d8

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