GN: Set -fstack-protector for arm64 to match GYP

build/config/compiler/BUILD.gn

Index: build/config/compiler/BUILD.gn
diff --git a/build/config/compiler/BUILD.gn b/build/config/compiler/BUILD.gn
index 5323c6e4cb8132d29b0f131f0e05abcb9672d27d..619c1b9d127896bc515e20868f0106d0c6e8b197 100644
--- a/build/config/compiler/BUILD.gn
+++ b/build/config/compiler/BUILD.gn
@@ -163,7 +163,9 @@ config("compiler") {
     } else if (is_posix && !is_chromeos && !is_nacl) {
       # TODO(phajdan.jr): Use -fstack-protector-strong when our gcc supports it.
       cflags += [ "--param=ssp-buffer-size=4" ]
-      if (is_android && (current_cpu == "arm64" || current_cpu == "x86")) {
+
+      # The x86 toolchain currently has problems with stack-protector.
+      if (is_android && current_cpu == "x86") {
         cflags += [ "-fno-stack-protector" ]
       } else {
         cflags += [ "-fstack-protector" ]