libv4l: update to 1.20.0

Removed upstreamed patches.

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

libs/libv4l/patches/020-add-missing-includes.patch

@@ -1,61 +1,10 @@
---- a/utils/cec-ctl/cec-ctl.cpp
-+++ b/utils/cec-ctl/cec-ctl.cpp
-@@ -18,6 +18,7 @@
- #include <errno.h>
- #include <sys/ioctl.h>
- #include <stdarg.h>
-+#include <ctime>
- #include <cerrno>
- #include <string>
- #include <vector>
---- a/utils/cec-follower/cec-follower.h
-+++ b/utils/cec-follower/cec-follower.h
-@@ -9,6 +9,7 @@
- #define _CEC_FOLLOWER_H_
- 
- #include <stdarg.h>
-+#include <ctime>
- #include <cerrno>
- #include <string>
- #include <linux/cec-funcs.h>
---- a/utils/common/media-info.cpp
-+++ b/utils/common/media-info.cpp
-@@ -21,6 +21,7 @@
- #include <linux/media.h>
- 
- #include <fstream>
-+#include <iostream>
- #include <media-info.h>
- 
- static std::string num2s(unsigned num, bool is_hex = true)
---- a/utils/rds-ctl/rds-ctl.cpp
-+++ b/utils/rds-ctl/rds-ctl.cpp
-@@ -27,6 +27,8 @@
- #include <linux/videodev2.h>
- #include <libv4l2rds.h>
+--- a/utils/libcecutil/cec-info.cpp
++++ b/utils/libcecutil/cec-info.cpp
+@@ -5,6 +5,7 @@
+  * Copyright 2017 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
+  */
  
 +#include <cctype>
-+#include <ctime>
- #include <list>
- #include <vector>
- #include <map>
---- a/utils/v4l2-compliance/media-info.cpp
-+++ b/utils/v4l2-compliance/media-info.cpp
-@@ -21,6 +21,7 @@
- #include <linux/media.h>
- 
- #include <fstream>
-+#include <iostream>
- #include <media-info.h>
- 
- static std::string num2s(unsigned num, bool is_hex = true)
---- a/utils/v4l2-ctl/media-info.cpp
-+++ b/utils/v4l2-ctl/media-info.cpp
-@@ -21,6 +21,7 @@
- #include <linux/media.h>
- 
- #include <fstream>
-+#include <iostream>
- #include <media-info.h>
- 
- static std::string num2s(unsigned num, bool is_hex = true)
+ #include <stdio.h>
+ #include <string>
+ #include <unistd.h>