Create the parent directory before creating the target file

Fixes building with OBJDIR.

doc/scripts/pkgconfig.sh

@@ -148,6 +148,7 @@ while [ $# -gt 0 ]; do
 	#create
 	source="${target#$OBJDIR}"
 	source="${source}.in"
+	$DEBUG $MKDIR -- "${target%/*}"				|| exit 2
 	$DEBUG $SED -e "s;@PACKAGE@;$PACKAGE;" \
 			-e "s;@VERSION@;$VERSION;" \
 			-e "s;@PREFIX@;$PREFIX;" \