lua: update Libs in lua.pc

Update Libs in lua.pc so that pkg-config --libs gives the correct list
of libraries for linking. This makes us effectively list the same
libraries as Fedora does.

Signed-off-by: Maciej Borzecki <maciej.borzecki@open-rnd.pl>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-oe/recipes-devtools/lua/lua/lua.pc.in

@@ -6,6 +6,5 @@ Name: Lua
 Description: Lua language engine
 Version: @VERSION@
 Requires:
-Libs: -L${libdir} -llua
-Libs.private: -lm
+Libs: -L${libdir} -llua -lm -ldl
 Cflags: -I${includedir}