tccrun/win64: cleanup runtime function table

- call RtlDeleteFunctionTable
  (important for multiple compilations)

- the RUNTIME_FUNCTION* is now at the beginning of the
  runtime memory.  Therefor when tcc_relocate is called
  with user memory, this should be done manually before
  it is free'd:
      RtlDeleteFunctionTable(*(void**)user_mem);
      [ free(user_mem); ]

- x86_64-gen.c: expand char/short return values to int

tccelf.c

@@ -1735,6 +1735,7 @@ static void put_dt(Section *dynamic, int dt, addr_t val)
     dyn->d_un.d_val = val;
 }
 
+#ifndef TCC_TARGET_PE
 static void add_init_array_defines(TCCState *s1, const char *section_name)
 {
     Section *s;
@@ -1762,6 +1763,7 @@ static void add_init_array_defines(TCCState *s1, const char *section_name)
                 ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
                 s->sh_num, sym_end);
 }
+#endif
 
 static int tcc_add_support(TCCState *s1, const char *filename)
 {
@@ -1842,10 +1844,12 @@ ST_FUNC void tcc_add_linker_symbols(TCCState *s1)
                 bss_section->data_offset, 0,
                 ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
                 bss_section->sh_num, "_end");
+#ifndef TCC_TARGET_PE
     /* horrible new standard ldscript defines */
     add_init_array_defines(s1, ".preinit_array");
     add_init_array_defines(s1, ".init_array");
     add_init_array_defines(s1, ".fini_array");
+#endif
 
     /* add start and stop symbols for sections whose name can be
        expressed in C */