Win32: don't build NPAPI in package-win-common
Win32: don't build NPAPI in package-win-common

Many people don't care about NPAPI and it's hard to build

(cherry picked from commit 969a8451cc02885a0fb411da1216667f2f38a302)
Signed-off-by: Jean-Baptiste Kempf <7b85a41a628204b76aba4326273a3ccc74bd009a@videolan.org>

jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2