fix for the "tccgen.c: Use memmove for struct assignment"

./configure --enable-cross
    make
    tcc -o i386-tcc tcc.c
    tcc -o x86_64-tcc tcc.c
    tcc -o i386-win-tcc tcc.c
    In file included from tcc.c:22:
    In file included from libtcc.c:39:
    tccgen.c:2580: error: 'TOK_memmove' undeclared

tcctok.h

@@ -294,10 +294,10 @@
      DEF(TOK_memalign, "memalign")
      DEF(TOK_calloc, "calloc")
 # endif
-     DEF(TOK_memmove, "memmove")
      DEF(TOK_strlen, "strlen")
      DEF(TOK_strcpy, "strcpy")
 #endif
+ DEF(TOK_memmove, "memmove")
 
 /* Tiny Assembler */
  DEF_ASM(byte)