* Cirrus-CI: update to FreeBSD 13.3
* proc,go.mod: update x/sys remove KeepAlive calls
Update version of golang.org/x/sys to the latest version and remove
calls to runtime.KeepAlive calls that were added to the FreeBSD backend
to work around an issue in the version of x/sys that we were using.
* proc,locspec: support setting breakpoints by func name on generic funcs
Changes proc.Function to parse function names correctly when they
contain instantiation lists and locspec to match generic functions.
* vendor: update golang.org/x/tools
The old version of golang.org/x/tools is incompatible with the new
iexport format.
