Lua: Create symlink matching the soname

prepareInstalledDevelLib will only take care of $developDir.

dev-lang/lua/lua-5.2.1.recipe

@@ -43,6 +43,8 @@ INSTALL()
 		INSTALL_INC="$includeDir" INSTALL_LMOD="$dataDir/lua/5.2" \
 		INSTALL_LIB="$libDir" INSTALL_BIN="$binDir"
 
+	ln -s liblua.so $libDir/liblua.so.5.2
+
 	prepareInstalledDevelLib liblua
 	packageEntries devel $developDir
 }