rust-toolset:rhel8 security, bug fix, and enhancement update

Rust Toolset provides the Rust programming language compiler rustc, the cargo build tool and dependency manager, and required libraries.

The following packages have been upgraded to a later upstream version: rust (1.54.0).

Security Fix(es):

* rust: incorrect parsing of extraneous zero characters at the beginning of an IP address string (CVE-2021-29922)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

CVE-2021-29922
library/std/src/net/parser.rs in Rust before 1.53.0 does not properly consider extraneous zero characters at the beginning of an IP address string, which (in some situations) allows attackers to bypass access control that is based on IP addresses, because of unexpected octal interpretation.

Modularity name: rust-toolset
Stream name: rhel8