un-XFAIL lib-map.rs now that rust stacks are large and it passes on linux.

Author: froystig

src/Makefile

@@ -410,7 +410,6 @@ TEST_XFAILS_X86 :=  $(TASK_XFAILS) \
                     test/run-pass/generic-recursive-tag.rs \
                     test/run-pass/iter-ret.rs \
                     test/run-pass/lib-io.rs \
-                    test/run-pass/lib-map.rs \
                     test/run-pass/mlist-cycle.rs \
                     test/run-pass/obj-as.rs \
                     test/run-pass/task-comm.rs \