win64: add tiny unwind data for setjmp/longjmp

This enables native unwind semantics with longjmp on
win64 by putting an entry into the .pdata section for
each compiled fuction.

Also, the function now use a fixed stack and store arguments
into X(%rsp) rather than using push.

tccrun.c

@@ -78,6 +78,13 @@ int tcc_run(TCCState *s1, int argc, char **argv)
         return ret;
     }
 #endif
+
+#ifdef TCC_TARGET_PE
+    {
+      unsigned char *p = tcc_get_symbol(s1, "tinyc_no_getbp");
+      if (p) *p = 0;
+    }
+#endif
     return (*prog_main)(argc, argv);
 }