Switch to -msign-return-address=all for gcc-8

Author: jgowdy

configure.py

@@ -1233,7 +1233,7 @@ def configure_node(o):
 
   # Enable branch protection for arm64
   if target_arch == 'arm64':
-    o['cflags']+=[' -mbranch-protection=pac-ret ']
+    o['cflags']+=['-msign-return-address=all']
 
   if options.node_snapshot_main is not None:
     if options.shared: