Clang: Reparse only if files are changed

Includes are now watched by a file watcher. Unsaved file changes are
watched too. If they are changed the translation units which depend on
them are set to a state which require a reparse. Later the diagnostics
of this units are collected and send back to creator.

Change-Id: I2fb5c7dd6644687f22399edd8d18edd6215c9505
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@theqtcompany.com>

src/libs/sqlite/utf8string.cpp

@@ -263,3 +263,8 @@ void PrintTo(const Utf8String &text, ::std::ostream* os)
 {
     *os << "\"" << text.toByteArray().data() << "\"";
 }
+
+uint qHash(const Utf8String &utf8String)
+{
+    return qHash(utf8String.byteArray);
+}