win64: try to fix linkage

- revert to R_X86_64_PC32 for near calls on PE
- revert to s1->section_align set to zero by default

Untested. Compared to release_0_9_26 the pe-image looks back to
normal.  There are some differences in dissassembly (r10/r11 usage)
but maybe that's ok.

libtcc.c

@@ -1033,7 +1033,6 @@ LIBTCCAPI TCCState *tcc_new(void)
                                       ".dynhashtab", SHF_PRIVATE);
     s->alacarte_link = 1;
     s->nocommon = 1;
-    s->section_align = ELF_PAGE_SIZE;
 
 #ifdef CHAR_IS_UNSIGNED
     s->char_is_unsigned = 1;