Revert "[BOLT][TEST] Fix test failures on AArch64 builder"

This reverts commit 88b6d3211c.

bolt/test/Inputs/icf-jump-tables.c

@@ -1,3 +1,5 @@
+#include <stdio.h>
+
 int inc(int x) {
   switch (x) {
     case 0: puts("0"); return 1;

bolt/test/X86/Inputs/avx512.c

@@ -1,9 +1,14 @@
+#include <stdio.h>
+
 void use_avx512() {
+  printf("after first entry\n");
   asm (".byte 0x62, 0xe2, 0xf5, 0x70, 0x2c, 0xda");
-  asm("secondary_entry:");
+  asm ("secondary_entry:");
+  printf("after secondary entry\n");
 }
 
 int main() {
+  printf("about to use avx-512 instruction...\n");
   use_avx512();
 
   return 0;

bolt/test/X86/Inputs/inline-foo.c

@@ -1,4 +1,4 @@
-// don't include stdio as the test is linked with -nostdlib
+#include <stdio.h>
 
 void foo() {
   puts("Hello world!\n");