lang/rust: Update to 1.34.0
- Update devel/racer to latest version that can build with 1.34.0
- Drop no longer needed patch from textproc/ripgrep
- Force rebuild all consumers to catch regressions early
Thanks to Mikaƫl Urankar for providing updated bootstraps for
aarch64, armv6, armv7, powerpc64.
Changes: https://blog.rust-lang.org/2019/04/11/Rust-1.34.0.html
Reviewed by: jbeich
With hat: rust
Differential Revision: https://reviews.freebsd.org/D19850