Clang: Set -fms-compatibility-version explicitly

Infer the version from the _MSC_FULL_VER macro, so it cannot get out of sync
with that.

Adapt the analyzer to do the same.

Based on

  commit daf08d8702
  Clang Static Analyzer: Workaround analyzing MSVC2015 projects with clang 3.8.0

Change-Id: I9d34abdbe2c83fe271eadd8d051caad43aca6772
Reviewed-by: Christian Kandeler <christian.kandeler@theqtcompany.com>

src/plugins/clangcodemodel/clangutils.cpp

@@ -99,6 +99,8 @@ public:
         optionsBuilder.addHeaderPathOptions();
         optionsBuilder.addProjectConfigFileInclude();
 
+        optionsBuilder.addMsvcCompatibilityVersion();
+
         optionsBuilder.addExtraOptions();
 
         return optionsBuilder.options();