12013 fix GCC4 as primary compiler

*** 29,39 ****
  IDENT(static);
  
  /* C99 keywords */
  IDENT(restrict); IDENT(__restrict); IDENT(__restrict__);
  IDENT(_Bool);
! IDENT(_Complex);
  IDENT_RESERVED(_Imaginary);
  
  /* C11 keywords */
  IDENT(_Alignas);
  IDENT_RESERVED(_Alignof);
--- 29,39 ----
  IDENT(static);
  
  /* C99 keywords */
  IDENT(restrict); IDENT(__restrict); IDENT(__restrict__);
  IDENT(_Bool);
! IDENT_RESERVED(_Complex);
  IDENT_RESERVED(_Imaginary);
  
  /* C11 keywords */
  IDENT(_Alignas);
  IDENT_RESERVED(_Alignof);