Align flags with make

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

Change-Id: I8c77fc215ed7677b8ac15a6d39143b519068dd55
diff --git a/cc/mips64_device.go b/cc/mips64_device.go
index a0e39a6..8e433c6 100644
--- a/cc/mips64_device.go
+++ b/cc/mips64_device.go
@@ -34,6 +34,7 @@
 		"-ffunction-sections",
 		"-fdata-sections",
 		"-funwind-tables",
+		"-fstack-protector-strong",
 		"-Wa,--noexecstack",
 		"-Werror=format-security",
 		"-D_FORTIFY_SOURCE=2",