Bump libtbb version requirement to 3.0 (Interface 5005) minimum

Note that since 3.0 compatability uses the preview version of
concurrent priority queues, version 4.0 or higher is stronly
recommended.

CMake/HPHPFindLibs.cmake

@@ -207,11 +207,11 @@ endif()
 
 # tbb libs
 find_package(TBB REQUIRED)
-if (${TBB_INTERFACE_VERSION} LESS 3016)
+if (${TBB_INTERFACE_VERSION} LESS 5005)
 	unset(TBB_FOUND CACHE)
 	unset(TBB_INCLUDE_DIRS CACHE)
 	unset(TBB_LIBRARIES CACHE)
-	message(FATAL_ERROR "TBB is too old, please install a newer version")
+	message(FATAL_ERROR "TBB is too old, please install at least 3.0(5005), preferably 4.0(6000) or higher")
 endif()
 include_directories(${TBB_INCLUDE_DIRS})
 link_directories(${TBB_LIBRARY_DIRS})