lttng-libust: bump version to 2.10.0

lttng-libust: bump version to 2.10.0

The deleted patches are removed because they are now upstream as of
LTTng-UST v2.10.0.

Adding 0001-configure.ac-add-disable-examples-option-to-not-buil.patch
which will be part of a release eventually (in master branch as of this
date) to add the --disable-examples option. This option configures the
build so that examples are not built, so as to avoid build problems with
examples which involve CMake.

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