cctools: add patch I forgot

pkgs/os-specific/darwin/cctools/undo-unknown-triple.patch

@@ -0,0 +1,17 @@
+diff --git a/cctools/as/driver.c b/cctools/as/driver.c
+index b06d085..c03397a 100644
+--- a/cctools/as/driver.c
++++ b/cctools/as/driver.c
+@@ -363,12 +363,6 @@ char **envp)
+ 	    /* Add -c or clang will run ld(1). */
+ 	    new_argv[j] = "-c";
+ 	    j++;
+-	    /* cctools-port start */
+-	    new_argv[j] = "-target";
+-	    j++;
+-	    new_argv[j] = "unknown-apple-darwin";
+-	    j++;
+-	    /* cctools-port end */
+ 	    new_argv[j] = NULL;
+ 	    if(execute(new_argv, verbose))
+ 		exit(0);