Doc: Add "\inmodule QtCreator" to \class and \namespace docs

To get rid of QDoc warnings.

Change-Id: Idd39b7ae4327798c376f424c94d6617bcaee2258
Reviewed-by: hjk <hjk@qt.io>

src/libs/utils/macroexpander.cpp

@@ -104,6 +104,7 @@ using namespace Internal;
 
 /*!
     \class Utils::MacroExpander
+    \inmodule QtCreator
     \brief The MacroExpander class manages \QC wide variables, that a user
     can enter into many string settings. The variables are replaced by an actual value when the string
     is used, similar to how environment variables are expanded by a shell.