component/qemu-kvm: build with libcap-ng

don't let configure autodetect and build something different depending
on the presence of this library in host system

component/qemu-kvm/buildout.cfg

@@ -4,6 +4,7 @@ extends =
   ../gnutls/buildout.cfg
   ../libaio/buildout.cfg
   ../libcap/buildout.cfg
+  ../libcap-ng/buildout.cfg
   ../libpng/buildout.cfg
   ../libuuid/buildout.cfg
   ../ncurses/buildout.cfg
@@ -32,8 +33,8 @@ configure-options =
   --enable-vnc
   --enable-vnc-png
   --disable-vnc-jpeg
-  --extra-cflags="-I${gnutls:location}/include -I${libuuid:location}/include -I${ncurses:location}/include -I${zlib:location}/include -I${libpng:location}/include -I${libaio:location}/include -I${attr:location}/include -I${libcap:location}/include"
-  --extra-ldflags="-Wl,-rpath -Wl,${glib:location}/lib -L${glib:location}/lib -Wl,-rpath -Wl,${gnutls:location}/lib -L${gnutls:location}/lib -Wl,-rpath -Wl,${libgpg-error:location}/lib -L${libgpg-error:location}/lib -L${gettext:location}/lib -Wl,-rpath -Wl,${gettext:location}/lib -Wl,-rpath -Wl,${libpng:location}/lib -L${libpng:location}/lib -L${libuuid:location}/lib -Wl,-rpath -Wl,${libuuid:location}/lib -L${libaio:location}/lib -Wl,-rpath=${libaio:location}/lib -L${ncurses:location}/lib -Wl,-rpath=${ncurses:location}/lib -L${zlib:location}/lib -Wl,-rpath -Wl,${zlib:location}/lib -lpng -lz -lgnutls -L${attr:location}/lib -Wl,-rpath=${attr:location}/lib -L${libcap:location}/lib -Wl,-rpath=${libcap:location}/lib"
+  --extra-cflags="-I${gnutls:location}/include -I${libuuid:location}/include -I${ncurses:location}/include -I${zlib:location}/include -I${libpng:location}/include -I${libaio:location}/include -I${attr:location}/include -I${libcap:location}/include -I${libcap-ng:location}/include "
+  --extra-ldflags="-Wl,-rpath -Wl,${glib:location}/lib -L${glib:location}/lib -Wl,-rpath -Wl,${gnutls:location}/lib -L${gnutls:location}/lib -Wl,-rpath -Wl,${libgpg-error:location}/lib -L${libgpg-error:location}/lib -L${gettext:location}/lib -Wl,-rpath -Wl,${gettext:location}/lib -Wl,-rpath -Wl,${libpng:location}/lib -L${libpng:location}/lib -L${libuuid:location}/lib -Wl,-rpath -Wl,${libuuid:location}/lib -L${libaio:location}/lib -Wl,-rpath=${libaio:location}/lib -L${ncurses:location}/lib -Wl,-rpath=${ncurses:location}/lib -L${zlib:location}/lib -Wl,-rpath -Wl,${zlib:location}/lib -lpng -lz -lgnutls -L${attr:location}/lib -Wl,-rpath=${attr:location}/lib -L${libcap:location}/lib -Wl,-rpath=${libcap:location}/lib -L${libcap-ng:location}/lib -Wl,-rpath=${libcap-ng:location}/lib"
   --disable-werror
   --disable-xfsctl
 environment =