convert_swig needs to get it's own list of header files

When comparing the file names coming out of ICG_processed to the compiler we need to
use the absolute path on both sides.

refs #113

libexec/trick/make_makefile_swig

@@ -109,6 +109,7 @@ sub read_files_to_process() {
     }
 
     foreach my $i ( @icg_processed ) {
+        $i = abs_path(dirname($i)) . "/" . basename($i) ;
         if ( exists $compiler_file_list{$i} ) {
             push @files_to_process , $i ;
         }