winebuild/winegcc: Allow building .dll.so without .spec file.

tools/winebuild/main.c

@@ -621,7 +621,6 @@ int main(int argc, char **argv)
     case MODE_DLL:
         if (spec->subsystem != IMAGE_SUBSYSTEM_NATIVE)
             spec->characteristics |= IMAGE_FILE_DLL;
-        if (!spec_file_name) fatal_error( "missing .spec file\n" );
         /* fall through */
     case MODE_EXE:
         load_resources( argv, spec );

tools/winegcc/winegcc.c

@@ -674,8 +674,6 @@ static void build(struct options* opts)
 	else if (file[1] == 'x')
 	    lang = file;
     }
-    if (opts->shared && !spec_file)
-	error("A spec file is currently needed in shared mode\n");
 
     /* building for Windows is completely different */