am 835816ae: Merge "arm: upgrade to _FORTIFY_SOURCE=2"

* commit '835816ae9eb9de2ae7b75e2318d5eba596f1275c':
  arm: upgrade to _FORTIFY_SOURCE=2
diff --git a/core/combo/TARGET_linux-arm.mk b/core/combo/TARGET_linux-arm.mk
index 24d57b2..1d1b6bb 100644
--- a/core/combo/TARGET_linux-arm.mk
+++ b/core/combo/TARGET_linux-arm.mk
@@ -101,7 +101,7 @@
 			-fstack-protector \
 			-Wa,--noexecstack \
 			-Werror=format-security \
-			-D_FORTIFY_SOURCE=1 \
+			-D_FORTIFY_SOURCE=2 \
 			-fno-short-enums \
 			$(arch_variant_cflags)