libevdev: update to 2.9.0

Converted to meson for compilation speed.

Removed uClibc-ng patch as tests no longer get built.

Small cleanups.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

libs/libevdev/patches/010-no-clock-monotonic-raw-in-uclibc.patch

@@ -1,14 +0,0 @@
---- a/test/test-libevdev-init.c
-+++ b/test/test-libevdev-init.c
-@@ -32,6 +32,11 @@
- #include <libevdev/libevdev-uinput.h>
- #include "test-common.h"
- 
-+/* work-around CLOCK_MONOTONIC_RAW definition missing in uClibc */
-+#ifndef CLOCK_MONOTONIC_RAW
-+#define CLOCK_MONOTONIC_RAW 4
-+#endif
-+
- START_TEST(test_new_device)
- {
- 	struct libevdev *dev;