lib: Move libopencsd to /usr/lib and make private

[andrew]

Summary

libopencsd is used to decode Arm CoreSight traces. It isn't needed
during the boot so can be moved to /usr/lib, and may change it's API
so can be marked as private as onlt the future hwt tool will use it.

Sponsored by: Arm Ltd

[ivy]

lib/libopencsd/Makefile

1

removing this means the library will be installed in the FreeBSD-utilities package. is this what we want?

if it's only used by one subsystem (hwt) it may make more sense for it to remain a separate package so it can be removed when that subsystem isn't installed.

[kevans]

lib/libopencsd/Makefile

1

I think the correct thing to do here would be to proactively place it in an hwt package if we expect hwt will arrive before 15.0 branches.

[ivy]

i landed D51374 to fix the build for now, so if we change the package here, release/packages/ucl/libopencsd-all.ucl should be renamed or deleted as appropriate.

[ivy]

lib/libopencsd/Makefile

1

if it's only used by hwt i am fine with this also.

[andrew]

lib/libopencsd/Makefile

1

If we are creating a new package it should probably be a performance tools package & include the hwpmc bits.

[andrew]

Rebase + remove libopencsd-all.ucl