[gdl] Fix make rule to build outside source tree

[Theppitak Karoonboonyanan <tkaroonb src gnome org>]

commit 3f6e337d35205eabcb77008aa8fa0588fd3bb791
Author: Theppitak Karoonboonyanan <thep linux thai net>
Date:   Fri May 8 16:27:21 2009 +0700

    Fix make rule to build outside source tree
    
    Access source files for glib-mkenums via VPATH, fixing non-sourcedir build
    failure. (Bug #581842)
---
 gdl/Makefile.am |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/gdl/Makefile.am b/gdl/Makefile.am
index f2c6856..fd27054 100644
--- a/gdl/Makefile.am
+++ b/gdl/Makefile.am
@@ -100,7 +100,7 @@ libgdltypebuiltins.c: $(libgdl_headers)
 			--vtail "  if (!type)\n" \
 			--vtail "    type = g_ type@_register_static (\"@EnumName \", _ enum_name@_values);\n\n" \
 			--vtail "  return type;\n}\n\n" \
-		$(libgdl_headers) > xgen-gtbec \
+		$^ > xgen-gtbec \
 	&& cp xgen-gtbec $(@F) \
 	&& rm -f xgen-gtbec
 
@@ -115,7 +115,7 @@ libgdltypebuiltins.h: $(libgdl_headers)
 			--fprod "\n/* --- @filename@ --- */" \
 			--eprod "#define GDL_TYPE_ ENUMSHORT@ @enum_name _get_type()\n" \
 			--eprod "GType @enum_name _get_type (void);\n" \
-		$(libgdl_headers) > xgen-gth \
+		$^ > xgen-gth \
 	&& cp xgen-gth $(@F) \
 	&& rm -f xgen-gth