is_excluded_for_compiler forgets to call DirectiveStack::release.

Direct leak of 6720 byte(s) in 30 object(s) allocated from:
    #0 0x7fcad46b89cf in __interceptor_malloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:69
    #1 0x7fcad0cb4a6f in os::malloc(unsigned long, MEMFLAGS, NativeCallStack const&) src/hotspot/share/runtime/os.cpp:654
    #2 0x7fcace81ce77 in AllocateHeap(unsigned long, MEMFLAGS, NativeCallStack const&, AllocFailStrategy::AllocFailEnum) src/hotspot/share/memory/allocation.cpp:42
    #3 0x7fcace81ce77 in AllocateHeap(unsigned long, MEMFLAGS, AllocFailStrategy::AllocFailEnum) src/hotspot/share/memory/allocation.cpp:52
    #4 0x7fcacf253e1e in CHeapObjBase::operator new(unsigned long, MEMFLAGS) src/hotspot/share/memory/allocation.hpp:183
    #5 0x7fcacf253e1e in CHeapObj<(MEMFLAGS)7>::operator new(unsigned long) src/hotspot/share/memory/allocation.hpp:237
    #6 0x7fcacf253e1e in DirectiveSet::clone(DirectiveSet const*) src/hotspot/share/compiler/compilerDirectives.cpp:564
    #7 0x7fcacf2595d0 in DirectiveSetPtr::cloned() src/hotspot/share/compiler/compilerDirectives.cpp:327
    #8 0x7fcacf2595d0 in DirectiveSet::compilecommand_compatibility_init(methodHandle const&) src/hotspot/share/compiler/compilerDirectives.cpp:400
    #9 0x7fcacf25a103 in DirectiveSet::compilecommand_compatibility_init(methodHandle const&) src/hotspot/share/compiler/compilerDirectives.cpp:353
    #10 0x7fcacf25a103 in DirectivesStack::getMatchingDirective(methodHandle const&, AbstractCompiler*) src/hotspot/share/compiler/compilerDirectives.cpp:723
    #11 0x7fcad190fe4f in is_excluded_for_compiler src/hotspot/share/prims/whitebox.cpp:826
    #12 0x7fcad190fe4f in WB_IsMethodCompilable src/hotspot/share/prims/whitebox.cpp:869
    #13 0x7fcabdb58ddf (<unknown module>)
    #14 0x7fcabdb5470d (<unknown module>)
    #15 0x7fcabdb5470d (<unknown module>)
    #16 0x7fcabdb545e5 (<unknown module>)
    #17 0x7fcabdb545e5 (<unknown module>)
    #18 0x7fcabdb545e5 (<unknown module>)
    #19 0x7fcabdb545e5 (<unknown module>)
    #20 0x7fcabdb545e5 (<unknown module>)
    #21 0x7fcabdb545e5 (<unknown module>)
    #22 0x7fcabdb545e5 (<unknown module>)
    #23 0x7fcabdb545e5 (<unknown module>)
    #24 0x7fcabdb37cc5 (<unknown module>)
    #25 0x7fcacfd5f676 in JavaCalls::call_helper(JavaValue*, methodHandle const&, JavaCallArguments*, JavaThread*) src/hotspot/share/runtime/javaCalls.cpp:415
    #26 0x7fcad002c904 in jni_invoke_static src/hotspot/share/prims/jni.cpp:887
    #27 0x7fcad0037cb7 in jni_CallStaticVoidMethod src/hotspot/share/prims/jni.cpp:1711
    #28 0x7fcad4dd049a in JavaMain src/java.base/share/native/libjli/java.c:547
    #29 0x7fcad4dd6708 in ThreadJavaMain src/java.base/unix/native/libjli/java_md.c:650
    #30 0x7fcad44a7fd3 in start_thread nptl/pthread_create.c:442