libv4l: Import from oldpackages, upgrade to 1.2.1, fix build

Update copyright, license info, add myself as pkg maintainer

Signed-off-by: Ted Hess <thess@kitschensync.net>

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

@@ -0,0 +1,10 @@
+--- a/utils/rds-ctl/rds-ctl.cpp
++++ b/utils/rds-ctl/rds-ctl.cpp
+@@ -29,6 +29,7 @@
+ #include <inttypes.h>
+ #include <getopt.h>
+ #include <sys/types.h>
++#include <ctype.h>
+ #include <fcntl.h>
+ #include <errno.h>
+ #include <sys/ioctl.h>