xbps-trigger: create compat symlink at pre-install time.

srcpkgs/xbps-triggers/INSTALL

@@ -1,11 +1,12 @@
 case "${ACTION}" in
-post)
+pre)
 	# Remove old triggers and create compat symlink.
 	if [ ! -d var/db/xbps ]; then
 		mkdir -p var/db/xbps
 	else
 		rm -rf var/db/xbps/triggers
 	fi
+	[ ! -d usr/libexec/${PKGNAME} ] && mkdir -p usr/libexec/${PKGNAME}
 	cd var/db/xbps && ln -sf ../../../usr/libexec/${PKGNAME} triggers
 	;;
 esac

srcpkgs/xbps-triggers/template

@@ -1,6 +1,6 @@
 # Template file for 'xbps-triggers'
 pkgname=xbps-triggers
-version=0.50
+version=0.51
 revision=1
 short_desc="XBPS triggers"
 maintainer="Juan RP <xtraeme@gmail.com>"