perf trace: Add filter support

This patchset adds filter support for perf counter, so not all
profile events are recorded but only those match the filters
we set.

An example:

 #./perf record -f -e irq:irq_handler_entry:irq==18:record
 or
 #./perf record -f -e irq:irq_handler_entry:irq==18 -R
 ^C
 # ./perf trace
 version = 0.5
            perf-4303  ... irq_handler_entry: irq=18 handler=eth0
            init-0     ... irq_handler_entry: irq=18 handler=eth0
            init-0     ... irq_handler_entry: irq=18 handler=eth0
            init-0     ... irq_handler_entry: irq=18 handler=eth0
            init-0     ... irq_handler_entry: irq=18 handler=eth0

---
 include/linux/ftrace_event.h       |   19 +++-
 include/linux/perf_counter.h       |    1 +
 include/linux/syscalls.h           |   14 ++-
 include/trace/ftrace.h             |   10 +-
 kernel/perf_counter.c              |   40 ++++++-
 kernel/trace/trace.h               |    9 +-
 kernel/trace/trace_event_profile.c |   18 +++
 kernel/trace/trace_events_filter.c |  247 +++++++++++++++++++++---------------
 kernel/trace/trace_syscalls.c      |    9 +-
 tools/perf/builtin-record.c        |   12 ++
 tools/perf/util/parse-events.c     |   48 ++++++-
 tools/perf/util/parse-events.h     |    1 +
 12 files changed, 303 insertions(+), 125 deletions(-)