libgit2: add option to build with ssh support.
libgit2: update 0.21.1 bottle.

Closes #33378.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
libtermkey: update 0.17 bottle.
libtess2: update 1.0 bottle.
libtextcat: update 2.2 bottle.
libtins: update 3.1 bottle.
libtomcrypt: update 1.17 bottle.
libtorrent-rasterbar: update 1.0.2_1 bottle.
libusrsctp: update 0.9.1 bottle.
libutf: update 20110530 bottle.
libuvc: update 0.0.5 bottle.
libvbucket: update 1.8.0.4 bottle.
libvidstab: update 0.98b bottle.
libvirt: update 1.2.9 bottle.
libvisio: update 0.1.0_3 bottle.
libvoikko: update 3.7.1 bottle.