[libclang] for c-index-test, check for CINDEXTEST_FAILONERROR when doing -test-load-source-reparse
[libclang] for c-index-test, check for CINDEXTEST_FAILONERROR when doing -test-load-source-reparse

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@144509 91177308-0d34-0410-b5e6-96231b3b80d8

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