drm_hwcomposer: Make uevent listener standalone

1. DRM event listener doesn't work in this conditions, uevent blocks
   the thread and non-blocking select() doesn't make any sense.
   Remove DRM event handling for now.

2. UEvent listeren is common for all DrmDevices, therefore put it into
   ResourceManager class.

Signed-off-by: Roman Stratiienko <roman.o.stratiienko@globallogic.com>
diff --git a/bufferinfo/legacy/BufferInfoMinigbm.cpp b/bufferinfo/legacy/BufferInfoMinigbm.cpp
index d030dff..1657ea6 100644
--- a/bufferinfo/legacy/BufferInfoMinigbm.cpp
+++ b/bufferinfo/legacy/BufferInfoMinigbm.cpp
@@ -21,6 +21,8 @@
 #include <xf86drm.h>
 #include <xf86drmMode.h>
 
+#include <cerrno>
+
 #include "cros_gralloc_handle.h"
 #include "utils/log.h"