ldconfig-native: Add RISC-V support

The current version of ldconfig does not support RISC-V.
Let's add a patch, that adds the required constant definitions
(from upstream glibc) and the necessary case statements.

Signed-off-by: Christoph Muellner <cmuellner@linux.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>