fake check_lib for cross-compilation

Signed-off-by: Francois Perrad <francois.perrad@gadz.org>

Index: b/Makefile.PL
===================================================================
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -84,8 +84,7 @@
 # -------------------------------------------------------------------------- #
 # -------------------------------------------------------------------------- #
 
-use lib qw(inc);
-use Devel::CheckLib;
+sub check_lib { return 1; }
 
 # Prompt the user here for any paths and other configuration