xbps-src: exit properly if mktemp(1) fails, not from its subshell.

Thanks @huglovefan

common/hooks/pre-pkg/04-generate-runtime-deps.sh

@@ -61,7 +61,7 @@ hook() {
         return 0
     fi
 
-    depsftmp=$(mktemp || exit 1)
+    depsftmp=$(mktemp) || exit 1
     find ${PKGDESTDIR} -type f -perm -u+w > $depsftmp 2>/dev/null
 
     exec 3<&0 # save stdin

common/hooks/pre-pkg/06-shlib-provides.sh

@@ -5,7 +5,7 @@ collect_sonames() {
 	local _destdir="$1" f _soname _fname _pattern
 	local _pattern="^[[:alnum:]]+(.*)+\.so(\.[0-9]+)*$"
 	local _versioned_pattern="^[[:alnum:]]+(.*)+\.so(\.[0-9]+)+$"
-	local _tmpfile="$(mktemp || exit 1)"
+	local _tmpfile=$(mktemp) || exit 1
 
 	if [ ! -d ${_destdir} ]; then
 		rm -f ${_tmpfile}