adding patch for issue 39 build error on archlinux (allocator static_assert error)

patch/02_archlinux_allocator_static_assert_error.patch

@@ -0,0 +1,12 @@
+diff --git a/code/CMakeModules/nel.cmake b/code/CMakeModules/nel.cmake
+index 95b28bb8a..8c4871379 100644
+--- a/code/CMakeModules/nel.cmake
++++ b/code/CMakeModules/nel.cmake
+@@ -874,7 +874,7 @@ MACRO(NL_SETUP_BUILD)
+     ENDIF()
+ 
+     # use c++0x standard to use std::unique_ptr and std::shared_ptr
+-    SET(PLATFORM_CXXFLAGS "${PLATFORM_CXXFLAGS} -std=c++0x")
++    SET(PLATFORM_CXXFLAGS "${PLATFORM_CXXFLAGS} -std=gnu++14")
+ 
+     ADD_PLATFORM_FLAGS("-D_REENTRANT")