UBUNTU: SAUCE: (no-up) trace: add trace events for open(), exec() and uselib() (for...

UBUNTU: SAUCE: (no-up) trace: add trace events for open(), exec() and uselib() (for v3.7+)

BugLink: http://bugs.launchpad.net/bugs/462111
This patch uses TRACE_EVENT to add tracepoints for the open(),
exec() and uselib() syscalls so that ureadahead can cheaply trace
the boot sequence to determine what to read to speed up the next.

It's not upstream because it will need to be rebased onto the syscall
trace events whenever that gets merged, and is a stop-gap.

[apw@canonical.com: updated for v3.7 and later.]
[apw@canonical.com: updated for v3.19 and later.]
BugLink: http://bugs.launchpad.net/bugs/1085766
Signed-off-by: Scott James Remnant <scott@ubuntu.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Andy Whitcroft <andy.whitcroft@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Conflicts:

	fs/open.c

Signed-off-by: Tim Gardner <tim.gardner@canonical.com>