tccelf: fix debug section relocation

With:
   tcc -g hello.c
   gdb a.out
     b main
gdb refused to know "main" because of broken dwarf info.

This partially reverts commit 0d598aca08.
I don't remember what the problem was but it was the wrong way
to fix it.

tccelf.c

@@ -2178,7 +2178,7 @@ static int elf_output_file(TCCState *s1, const char *filename)
         /* XXX: ignore sections with allocated relocations ? */
         for(i = 1; i < s1->nb_sections; i++) {
             s = s1->sections[i];
-            if (s->reloc && s != s1->got && (s->sh_flags & SHF_ALLOC)) //gr
+            if (s->reloc && s != s1->got)
                 relocate_section(s1, s);
         }