Purpose: tweak cmake build
Forward: keep it here.
--- a/lib/THNN/CMakeLists.txt
+++ b/lib/THNN/CMakeLists.txt
@@ -61,7 +61,7 @@
 LINK_DIRECTORIES("${Torch_INSTALL_LIB}")
 
 SET(src init.c)
-ADD_LIBRARY(THNN MODULE init.c)
+ADD_LIBRARY(THNN SHARED init.c)
 INCLUDE_DIRECTORIES(${CMAKE_CURRENT_SOURCE_DIR})
 ### Torch packages supposes libraries prefix is "lib"
 SET_TARGET_PROPERTIES(THNN PROPERTIES
@@ -71,7 +71,7 @@
 TARGET_LINK_LIBRARIES(THNN ${TH_LIBRARIES})
 
 # Luarocks bug pre-14.04 prevents us from setting it for Lua-Torch
-IF(THNN_SO_VERSION)
+IF(USE_THNN_SO_VERSION)
   MESSAGE(STATUS "THNN_SO_VERSION: ${THNN_SO_VERSION}")
   SET_TARGET_PROPERTIES(THNN PROPERTIES
     VERSION   ${THNN_SO_VERSION}
