cmake: change the Linux linking to add an explicit lua dependency

The point of the patch is to avoid relying on indirect/implicit Lua
linkage on Linux, because we are building luv against system Lua.

Signed-off-by: Matěj Cepl <mcepl@cepl.eu>

Author: mcepl

CMakeLists.txt

@@ -267,7 +267,7 @@ foreach(TARGET_NAME ${ACTIVE_TARGETS})
       endif (USE_LUAJIT)
     endif (LUA)
   elseif("${CMAKE_SYSTEM_NAME}" MATCHES "Linux")
-    target_link_libraries(${TARGET_NAME} ${LIBUV_LIBRARIES} rt)
+    target_link_libraries(${TARGET_NAME} ${LIBUV_LIBRARIES} rt lua)
   else()
     target_link_libraries(${TARGET_NAME} ${LIBUV_LIBRARIES})
   endif()