VS: Fix /MANIFESTUAC:NO linker option mapping

There are no versions of /MANIFESTUAC:NO where addition values are
appended.  Remove both of the MANIFESTUAC:NO entries from our flag
tables and replace them with one which would set EnableUAC to false and
immediately stop processing the /MANIFESTUAC:NO option.
Merge topic 'vs-fix-MANIFESTUAC' into next

9c7f234c VS: Fix /MANIFESTUAC:NO linker option mapping