Upgrade to 8.2.

• Remove patches for upstream commits in 8.2.
• Add an upstream patch to include NT_PROCSTAT_AUXV, NT_PROCSTAT_PS_STRINGS, and NT_PROCSTAT_VMMAP notes in core dumps generated by 'gcore'.
• Update kgdb for changes in 8.2.
• Add 'USES=gettext-runtime'

Reviewed by: pizzamig (maintainer)
Differential Revision: https://reviews.freebsd.org/D17085