cmake: Add options for verbose output to --build mode

While we already support VERBOSE environment variable and CMAKE_VERBOSE_MAKEFILE cached variable, add -V and --verbose command line options to be able to activate verbose output directly from CMake's build tool mode command line.

Also make xcodebuild and msbuild honor the verbosity setting (currently the default for both is verbose output and we now only make it verbose when the new command line options mentioned above are added).