ClangPchManager: Remove target triple

We don't need it so far and it is creating trouble.

Change-Id: Ia502452717b5be935e4ba2cd2de04007e4144199
Reviewed-by: Ivan Donchevskii <ivan.donchevskii@qt.io>

src/plugins/clangpchmanager/projectupdater.cpp

@@ -154,7 +154,7 @@ QStringList ProjectUpdater::toolChainArguments(CppTools::ProjectPart *projectPar
 
     builder.addWordWidth();
     builder.addPicIfCompilerFlagsContainsIt();
-    builder.addTargetTriple();
+    // builder.addTargetTriple(); TODO resarch why target triples are different
     builder.addExtraCodeModelFlags();
     builder.undefineClangVersionMacrosForMsvc();
     builder.undefineCppLanguageFeatureMacrosForMsvc2015();