8221726: Multiple build failures after JDK-8221698 (Remove redundant includes from popular header files)

Reviewed-by: dholmes, stuefe, iklam

src/hotspot/cpu/ppc/gc/shared/barrierSetAssembler_ppc.cpp

@@ -27,6 +27,7 @@
 #include "asm/macroAssembler.inline.hpp"
 #include "gc/shared/barrierSetAssembler.hpp"
 #include "interpreter/interp_masm.hpp"
+#include "runtime/jniHandles.hpp"
 
 #define __ masm->
 

src/hotspot/share/classfile/systemDictionary.hpp

@@ -30,6 +30,7 @@
 #include "oops/objArrayOop.hpp"
 #include "oops/symbol.hpp"
 #include "runtime/java.hpp"
+#include "runtime/mutexLocker.hpp"
 #include "runtime/reflectionUtils.hpp"
 #include "runtime/signature.hpp"
 #include "utilities/hashtable.hpp"