Shorten linker output even more when --verbose is not present

[jyn514]

• Don't show environment variables. Seeing PATH is almost never useful, and it can be extremely long.
• For .rlibs in the sysroot, replace crate hashes with a "-*" string. This will expand to the full crate name when pasted into the shell.
• Move .rlib to outside the glob.
• Abbreviate the sysroot path to <sysroot> wherever it appears in the arguments.

This also adds an example of the linker output as a run-make test. Currently it only runs on x86_64-unknown-linux-gnu, because each platform has its own linker arguments. So that it's stable across machines, pass BUILD_ROOT as an argument through compiletest through to run-make tests.

r? @bjorn3

[rustbot]

This PR modifies tests/run-make/. If this PR is trying to port a Makefile
run-make test to use rmake.rs, please update the
run-make port tracking issue
so we can track our progress. You can either modify the tracking issue
directly, or you can comment on the tracking issue and link this PR.

cc @jieyouxu

Some changes occurred in src/tools/compiletest

cc @jieyouxu

The run-make-support library was changed

cc @jieyouxu

These commits modify the Cargo.lock file. Unintentional changes to Cargo.lock can be introduced when switching branches and rebasing PRs.

If this was unintentional then you should revert the changes before this PR is merged.
Otherwise, you can ignore this comment.

[jyn514]

For comparison, this is what the error looked like before

and after

[rustbot]

The list of allowed third-party dependencies may have been modified! You must ensure that any new dependencies have compatible licenses before merging.

cc @davidtwco, @wesleywiser

[jyn514]

You must ensure that any new dependencies have compatible licenses before merging.

dual-licensed as mit and apache: /~https://github.com/BurntSushi/bstr/blob/master/Cargo.toml#L11

[jyn514]

This is ready for review.