gphoto2: Adds recipe for gphoto2 2.5.8

gphoto2 is a command line frontend for libgphoto2.
The patch 0001-configure.ac-remove-AM_PO_SUBDIRS is very similar
to the corresponding patch in the libgphoto2 recipe and is required
to make the tool compile.
Without the patch 0002-Look-for-popt-with-GP_CHECK_LIBARY-function,
the popt library would be taken from the host system.
In the EXTRA_OECONF, the --with-jpeg-prefix is required to avoid
the host system's jpeg library to be found.
--without-cdk is required since the cdk headers are not found anywhere.
According to gphoto2's configure.ac file, removing cdk
removes "interactive access to the camera's configuration".
Pure pure command-line access is retained, though.

Signed-off-by: Andreas Baak <andreas.baak@gmail.com>