Define the Intel compiler and Microsoft C++ versions in the Q_CC_ macros

This is for completeness, since we've done the same for Q_CC_GNU and
Q_CC_CLANG. We won't really use the macros like this because both
__INTEL_COMPILER and _MSC_VER are readily usable.

Change-Id: I669c60166fa4839d43f84f339e6896321d62817f
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>