File automake-1.13.patch of Package libpgf

--- configure.ac.orig	2012-06-26 11:03:01.000000000 +0300
+++ configure.ac	2013-03-23 00:11:18.142544903 +0200
@@ -26,7 +26,7 @@
 
 AM_INIT_AUTOMAKE(libpgf,6.12.24)
 AC_PROG_LIBTOOL
-AM_CONFIG_HEADER( config.h )
+AC_CONFIG_HEADERS( config.h )
 AC_PROG_CXX
 
 dnl Check for doxygen support