Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

Update Intel Processor Trace decoder library.

Its latest version merged from:
^/vendor/processor-trace/892e12c5a27bda5806d1e63269986bb4171b5a8b

Sponsored by: DARPA, AFRL

Add new shared library -- libipt.

libipt is the Intel Processor Trace (Intel PT) packets decoder.

- Include libipt to amd64 build.
- Install libipt headers to /usr/include/libipt/

Sponsored by: DARPA, AFRL