Fix some code suppression fallout

Some more subtle issues with code suppression:
- outputting asms but not their operand setup is broken
- but global asms must always be output
- statement expressions are transparent to code suppression
- vtop can't be transformed from VT_CMP/VT_JMP when nocode_wanted

Also remove .exe files from tests2 if they don't fail.

tests/tests2/85-asm-outside-function.c

@@ -1,7 +1,9 @@
+extern int printf (const char *, ...);
 extern void vide(void);
 __asm__("vide: ret");
 
 int main() {
     vide();
+    printf ("okay\n");
     return 0;
 }