Align flags with make

This pulls a number of cflag changes from make since our last sync.

Change-Id: I8c77fc215ed7677b8ac15a6d39143b519068dd55
diff --git a/cc/x86_device.go b/cc/x86_device.go
index e5a8f66..f3a4b08 100644
--- a/cc/x86_device.go
+++ b/cc/x86_device.go
@@ -36,7 +36,7 @@
 		"-fstrict-aliasing",
 		"-funswitch-loops",
 		"-funwind-tables",
-		"-fstack-protector",
+		"-fstack-protector-strong",
 		"-no-canonical-prefixes",
 		"-fno-canonical-system-headers",