[gnome-characters] build: Fix dependency on gen-libunistring-pot

[Daiki Ueno <dueno src gnome org>]

commit 5cad09f0f8a361b452c8419098b5f48edf705d46
Author: Daiki Ueno <dueno src gnome org>
Date:   Sun Feb 15 14:50:36 2015 +0900

    build: Fix dependency on gen-libunistring-pot
    
    Make it order-only so not to reproduce libunistring.pot every time
    gen-libunistring-pot is built.

 lib/Makefile.am |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)
---
diff --git a/lib/Makefile.am b/lib/Makefile.am
index 9b12210..d287fb8 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -19,8 +19,7 @@ noinst_PROGRAMS = gen-libunistring-pot
 gen_libunistring_pot_SOURCES = gen-libunistring-pot.c
 gen_libunistring_pot_LDADD = $(LIBGC_LIBS) $(LTLIBICONV) $(LTLIBUNISTRING) $(builddir)/../gllib/libgnu.la
 
-BUILT_SOURCES = libunistring.pot
-libunistring.pot: gen-libunistring-pot
+libunistring.pot: | gen-libunistring-pot
        $(AM_V_GEN) $(builddir)/gen-libunistring-pot | $(MSGUNIQ) > $@
 
 include $(INTROSPECTION_MAKEFILE)