Add ConcurrentHashMap installable

Summary:
ConcurrentHashMap is a newly added feature and we wanted to test it in our enviornment, making it installable.

Built & Installed on ubuntu 14 env.
Closes https://github.com/facebook/folly/pull/659

Reviewed By: djwatson

Differential Revision: D5629159

Pulled By: yfeldblum

fbshipit-source-id: 8a40e768f3db7918a3b284059f2efa0b7ecb9aca

folly/Makefile.am

@@ -57,7 +57,9 @@ nobase_follyinclude_HEADERS = \
 	CpuId.h \
 	CPortability.h \
 	concurrency/CacheLocality.h \
+	concurrency/ConcurrentHashMap.h \
 	concurrency/CoreCachedSharedPtr.h \
+	concurrency/detail/ConcurrentHashMap-detail.h \
 	detail/AtomicHashUtils.h \
 	detail/AtomicUnorderedMapUtils.h \
 	detail/AtomicUtils.h \
@@ -119,6 +121,10 @@ nobase_follyinclude_HEADERS = \
 	experimental/exception_tracer/StackTrace.h \
 	experimental/FunctionScheduler.h \
 	experimental/FutureDAG.h \
+	experimental/hazptr/debug.h \
+	experimental/hazptr/hazptr.h \
+	experimental/hazptr/hazptr-impl.h \
+	experimental/hazptr/memory_resource.h \
 	experimental/io/FsUtil.h \
 	experimental/JemallocNodumpAllocator.h \
 	experimental/JSONSchema.h \
@@ -484,6 +490,8 @@ libfolly_la_SOURCES = \
 	futures/QueuedImmediateExecutor.cpp \
 	futures/ThreadWheelTimekeeper.cpp \
 	futures/test/TestExecutor.cpp \
+	experimental/hazptr/hazptr.cpp \
+	experimental/hazptr/memory_resource.cpp \
 	GlobalThreadPoolList.cpp \
 	GroupVarint.cpp \
 	GroupVarintTables.cpp \