Add lua library names to PATH_SUFFIXES

This solves the "issue" that apk only adds versioned symlinks
to /usr/lib/, thus causing find_library to come up empty for
the default CMAKE_FIND_LIBRARY_SUFFIXES.

Author: hoxell

cmake/FindLua.cmake

@@ -114,7 +114,7 @@ find_library(LUA_LIBRARY
   NAMES ${_lua_library_names} lua
   HINTS
     ENV LUA_DIR
-  PATH_SUFFIXES lib
+  PATH_SUFFIXES lib ${_lua_library_names}
   PATHS
   ~/Library/Frameworks
   /Library/Frameworks