Add patch for bgp pthread.

Author: patmarion

paraview-bgp-have-pthread.patch

@@ -0,0 +1,12 @@
+diff --git a/CMake/TryRunResults-ParaView3-bgl-xlc.cmake b/CMake/TryRunResults-ParaView3-bgl-xlc.cmake
+index 32259de..5edb87c 100644
+--- a/CMake/TryRunResults-ParaView3-bgl-xlc.cmake
++++ b/CMake/TryRunResults-ParaView3-bgl-xlc.cmake
+@@ -167,5 +167,5 @@ SET( HDF5_PRINTF_LL_TEST_RUN__TRYRUN_OUTPUT
+ # xlc has a pthread.h which can be included, but it's basically empty
+ # anyway check_include_files(pthread.h) returns TRUE, so a more
+ # sophisticated test would be required. Just force the correct result here.
+-SET(HAVE_PTHREAD_H FALSE CACHE BOOL "No usable pthread.h" FORCE)
+-SET(CMAKE_HAVE_PTHREAD_H FALSE CACHE BOOL "No usable pthread.h" FORCE)
++#SET(HAVE_PTHREAD_H FALSE CACHE BOOL "No usable pthread.h" FORCE)
++#SET(CMAKE_HAVE_PTHREAD_H FALSE CACHE BOOL "No usable pthread.h" FORCE)