hooks/create-xbps-metadata-scripts: fix mktemp assignation.

When set -o ERR is set the exit case wasn't executed. From the bash
manual page:

"The ERR trap is not executed if the
failed command is part of the command list immediately following
a while or until keyword, part of the test in an if statement,
part of a command executed in a && or || list except the command
following the final && or ||, any command in a pipeline but the
last, or if the command's return value is being inverted using
!.  These are the same conditions obeyed by the errexit (-e)
option."

common/hooks/post-install/04-create-xbps-metadata-scripts.sh

@@ -12,7 +12,7 @@ _add_trigger() {
 process_metadata_scripts() {
 	local action="$1"
 	local action_file="$2"
-	local tmpf=$(mktemp -t xbps-install.XXXXXXXXXX) || exit 1
+	local tmpf=$(mktemp)
 	local fpattern="s|${PKGDESTDIR}||g;s|^\./$||g;/^$/d"
 	local targets= f= _f= info_files= home= shell= descr= groups=
 	local found= triggers_found= _icondirs= _schemas= _mods= _tmpfiles=