package/libcgroup: add newline at end of file

In commit 9d58b525fcfd0d92fcdd3c66d7858213c4b139c6 the newline at the
end got accidentally removed. Re-add it.

Reported by check-package.

Signed-off-by: Arnout Vandecappelle <arnout@mind.be>

package/libcgroup/Config.in

@@ -18,4 +18,5 @@ config BR2_PACKAGE_LIBCGROUP_TOOLS
 endif
 
 comment "libcgroup needs a toolchain w/ C++"
-	depends on !BR2_INSTALL_LIBSTDCPP
+	depends on !BR2_INSTALL_LIBSTDCPP
+