[gimp] data: create po-tags/ build directory.

[Jehan <jehanp src gnome org>]

commit 845f1c81ed12b855fafc7e37077c610807c11c62
Author: Jehan <jehan girinstud io>
Date:   Fri Dec 11 21:50:31 2020 +0100

    data: create po-tags/ build directory.
    
    We have a sudden CI failure which is maybe because of a change of
    intltool-merge. We believe it might be because of a missing directory.
    Let's test making it before running the command.
    
    Fixes:
    
    > /usr/bin/intltool-merge ../../../po-tags
    >   ../../../data/tags/gimp-tags-default.xml.in gimp-tags-default.xml -x -u
    >   -c ../../po-tags/.intltool-merge-cache
    > No such file or directory at /usr/bin/intltool-merge line 396.

 data/tags/Makefile.am | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/data/tags/Makefile.am b/data/tags/Makefile.am
index 3d75c88872..8ab943ab24 100644
--- a/data/tags/Makefile.am
+++ b/data/tags/Makefile.am
@@ -17,6 +17,7 @@ DISTCLEANFILES = $(tagsdata_data_files)
 
 
 gimp-tags-default.xml: gimp-tags-default.xml.in $(wildcard $(top_srcdir)/po-tags/*.po)
+       mkdir -p $(top_builddir)/po-tags/
        $(INTLTOOL_MERGE) $(top_srcdir)/po-tags $< $(@) -x -u -c $(top_builddir)/po-tags/.intltool-merge-cache