configure: fix alphabetical order of previous commit

Was requested in review
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

configure

@@ -5066,8 +5066,8 @@ elif enabled ccc; then
     add_cflags -msg_disable unsupieee
 elif enabled gcc; then
     check_optflags -fno-tree-vectorize
-    check_cflags -Werror=implicit-function-declaration
     check_cflags -Werror=format-security
+    check_cflags -Werror=implicit-function-declaration
     check_cflags -Werror=missing-prototypes
     check_cflags -Werror=return-type
     check_cflags -Werror=vla