Fix a bug that incorrectly reports GNU_STACK missing when its not. (#2493)

Author: devx00

pwnlib/elf/elf.py

@@ -2085,7 +2085,7 @@ def checksec(self, banner=True, color=True):
             "NX:".ljust(12) + {
                 True:  green("NX enabled"),
                 False: red("NX disabled"),
-                None: yellow("NX unknown - GNU_STACK missing"),
+                None:  yellow("NX enabled on new kernels"),
             }[self.nx],
             "PIE:".ljust(12) + {
                 True: green("PIE enabled"),