RFR [10]: Fix incorrect ifdef INCLUDE_ALL_GCS

[Aleksey Shipilev]

Recent sh/jdk10-specific improvement broke Minimal VM build, because guarding _gc_state with ifdef
INCLUDE_ALL_GCS is incorrect. Fixed other places too:

diff -r d8b264d29c5f src/hotspot/share/runtime/thread.cpp
--- a/src/hotspot/share/runtime/thread.cpp	Wed Jun 13 12:52:53 2018 +0200
+++ b/src/hotspot/share/runtime/thread.cpp	Thu Jun 14 10:09:30 2018 +0200
@@ -308,7 +308,7 @@
 #endif // ASSERT

   _oom_during_evac = 0;
-#ifdef INCLUDE_ALL_GCS
+#if INCLUDE_ALL_GCS
   _gclab = NULL;
   _gc_state = _gc_state_global;
 #endif
diff -r d8b264d29c5f src/hotspot/share/runtime/thread.hpp
--- a/src/hotspot/share/runtime/thread.hpp	Wed Jun 13 12:52:53 2018 +0200
+++ b/src/hotspot/share/runtime/thread.hpp	Thu Jun 14 10:09:30 2018 +0200
@@ -91,7 +91,7 @@

 class WorkerThread;

-#ifdef INCLUDE_ALL_GCS
+#if INCLUDE_ALL_GCS
 class PLAB;
 #endif

@@ -334,7 +334,7 @@
   volatile void* _polling_page;                 // Thread local polling page

   ThreadLocalAllocBuffer _tlab;                 // Thread-local eden
-#ifdef INCLUDE_ALL_GCS
+#if INCLUDE_ALL_GCS
   PLAB*                  _gclab;                // Thread-local allocation buffer for GC (e.g.
evacuation)
 #endif
   jlong _allocated_bytes;                       // Cumulative number of bytes allocated on
@@ -525,7 +525,7 @@
   }

   // Thread-Local GC Allocation Buffer (GCLAB) support
-#ifdef INCLUDE_ALL_GCS
+#if INCLUDE_ALL_GCS
   PLAB* gclab()                                  { return _gclab; }
   void set_gclab(PLAB* gclab)                    { _gclab = gclab; }
 #endif

Testing: minimal VM build, server VM tier1_gc_shenandoah

Thanks,
-Aleksey