libv4l: depends on jpeg so must select it

Fixes http://autobuild.buildroot.net/results/3053854fccd65bc5b28384f2a2039a33abeeea47

The introduction of the error message for the jpeg virtual package exposes
this kind of error.

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/libv4l/Config.in

@@ -1,6 +1,7 @@
 config BR2_PACKAGE_LIBV4L
 	bool "libv4l"
 	depends on BR2_LARGEFILE
+	select BR2_PACKAGE_JPEG
 	help
 	  libv4l is an accompanying collection of libraries that adds a thin
 	  abstraction layer on top of video4linux2 (V4L2) devices.