Fix travis failure in f_impl.c

Reviewed-by: NBernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/5105)

crypto/ec/curve448/arch_32/f_impl.c

@@ -12,7 +12,7 @@
 
 #include "field.h"
 
-#if (defined(__OPTIMIZE__) && !defined(__OPTIMIZE_SIZE__) && !I_HATE_UNROLLED_LOOPS) \
+#if (defined(__OPTIMIZE__) && !defined(__OPTIMIZE_SIZE__) && !defined(I_HATE_UNROLLED_LOOPS)) \
      || defined(C448_FORCE_UNROLL)
 # define REPEAT8(_x) _x _x _x _x _x _x _x _x
 # define FOR_LIMB(_i,_start,_end,_x) do { _i=_start; REPEAT8( if (_i<_end) { _x; } _i++;) } while (0)