Clang: Ignore include dirs matching lib/clang/x.y/include

On OS X the clang versioning is different.

This completes

    775661fa
    Clang: Ignore clang include directories from the toolchain

Task-number: QTCREATORBUG-14856
Change-Id: Ib93ce9fcf18a3c8693f9f2af8075eeef8b93fa32
Reviewed-by: Marco Bubke <marco.bubke@theqtcompany.com>

src/plugins/clangcodemodel/clangutils.cpp

@@ -154,7 +154,7 @@ private:
         // We already provide a custom clang include path matching the used libclang version,
         // so better ignore the clang include paths from the system as this might lead to an
         // unfavorable order with regard to include_next.
-        static QRegExp clangIncludeDir(QLatin1String(".*/lib/clang/\\d+\\.\\d+\\.\\d+/include"));
+        static QRegExp clangIncludeDir(QLatin1String(".*/lib/clang/\\d+\\.\\d+(\\.\\d+)?/include"));
         if (clangIncludeDir.exactMatch(path))
             return true;