PPC/s390: Fix included header in simulator

R=joransiu@ca.ibm.com, jbarboza@ca.ibm.com

Bug: 
Change-Id: Icb4c67c96cb44f75cd73e97929792795b1070dda
Reviewed-on: https://chromium-review.googlesource.com/733641Reviewed-by: Joran Siu <joransiu@ca.ibm.com>
Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#48843}

src/ppc/simulator-ppc.cc

@@ -12,6 +12,8 @@
 #include "src/base/bits.h"
 #include "src/codegen.h"
 #include "src/disasm.h"
+#include "src/macro-assembler.h"
+#include "src/ostreams.h"
 #include "src/ppc/constants-ppc.h"
 #include "src/ppc/frame-constants-ppc.h"
 #include "src/ppc/simulator-ppc.h"

src/s390/simulator-s390.cc

@@ -13,7 +13,8 @@
 #include "src/base/once.h"
 #include "src/codegen.h"
 #include "src/disasm.h"
-#include "src/frame-constants.h"
+#include "src/macro-assembler.h"
+#include "src/ostreams.h"
 #include "src/runtime/runtime-utils.h"
 #include "src/s390/constants-s390.h"
 #include "src/s390/simulator-s390.h"