Bump to 1.0.68

Bump to 1.0.67

Bump to 1.0.66

Split `s` out of the `ar` invocation (rust-lang#570)

This commit splits out the `s` command from the `ar` invocation to
happen as part of a separate step after the archive is fully assembled.
Turns out rust-lang#569 has an issue on Linux where `qs` implies `r` (??), so to
get the append-only behavior of `q` we need to omit the `s`.

Closes rust-lang#568 (for real this time?)

Bump to 1.0.64

Bump to 1.0.63

Bump to 1.0.62

Bump to 1.0.61

Bump to 1.0.60

Bump to 1.0.59