vocabs.platforms: Add inverse platform sections
vocabs.platforms: Add inverse platform sections

<UNIX
<!MACOSX
!MACOSX>
<MACOSX
MACOSX>
<LINUX
LINUX>
UNIX>

mrjbq7/factor,tgunr/factor,mrjbq7/factor,factor/factor,tgunr/factor,factor/factor,mrjbq7/factor,factor/factor,mrjbq7/factor,factor/factor,tgunr/factor,mrjbq7/factor,tgunr/factor,tgunr/factor,factor/factor,tgunr/factor,factor/factor,mrjbq7/factor