Makifile.am: ensure update locales with 'deploy-target'

On sdk build with the command 'devtool deploy-target' not updated
all locals were uploaded.
Effects could be gui will show messed  localized menues or windows.
To avoid this issues a complete  do_configure() was required
to force (or  bitbake  -c cleansstate ), this should solve this problem.

Makefile.am

@@ -2,3 +2,5 @@ SUBDIRS = lib src data
 
 locale-update:
 	make -C $(top_builddir)/data/locale install-locals
+
+.PHONY: locale-update