makepkg: only test for writable PKGDEST when needed.

There is no need for a writable PKGDEST when using the --nobuild or
--geninteg flags.

Allan: added --geninteg
Signed-off-by: Allan McRae <allan@archlinux.org>
Signed-off-by: Dan McGee <dan@archlinux.org>

scripts/makepkg.sh.in

@@ -1877,7 +1877,7 @@ pkgdir="$BUILDDIR/pkg"
 
 PKGDEST=${_PKGDEST:-$PKGDEST}
 PKGDEST=${PKGDEST:-$startdir} #default to $startdir if undefined
-if [[ ! -w $PKGDEST ]]; then
+if (( ! (NOBUILD || GENINTEG) )) && [[ ! -w $PKGDEST ]]; then
 	error "$(gettext "You do not have write permission to store packages in %s.")" "$PKGDEST"
 	plain "$(gettext "Aborting...")"
 	exit 1