Revert "package/urg: fix build"

This reverts commit 57e61a9153.

The patch doesn't apply, and makes the urg package fail in all
situations.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/urg/0001-select-h.patch

@@ -1,28 +1,11 @@
-Serial driver: add missing header to C and C++ serial driver
-
-Fixes:
-  http://autobuild.buildroot.net/results/cd7/cd76699188d2ee99b5f2d32b6a797de0d832a192/
-
-Signed-off-by: Samuel Martin <s.martin49@gmail.com>
-
---- a/src/c/connection/serial_ctrl_lin.c	2016-09-11 15:49:42.599807053 +0200
-+++ b/src/c/connection/serial_ctrl_lin.c	2016-09-11 15:50:07.850700420 +0200
-@@ -18,6 +18,7 @@
+--- urg-0.8.18/src/c/connection/serial_ctrl_lin.c	2010-11-22 01:48:01.000000000 +0000
++++ urg-0.8.18.mod/src/c/connection/serial_ctrl_lin.c	2013-05-21 20:56:35.822025969 +0100
+@@ -17,7 +17,7 @@
+ #include <fcntl.h>
  #include <errno.h>
  #include <string.h>
- 
+-
 +#include <sys/select.h>
  //#include <ctype.h>
  
  enum {
---- a/src/cpp/connection/SerialDevice_lin.cpp	2016-09-11 15:38:23.335547059 +0200
-+++ b/src/cpp/connection/SerialDevice_lin.cpp	2016-09-11 15:38:38.472741418 +0200
-@@ -13,7 +13,7 @@
- #include <cerrno>
- #include <cstring>
- #include <cstdio>
--
-+#include <sys/select.h>
- 
- class RawSerialDevice
- {