Use zlib from libz-sys

Signed-off-by: sagudev <16504129+sagudev@users.noreply.github.com>

Remove ErrorStackFrames clones patch (servo#473)

Also respect readelf and objcopy cc-rs variants (servo#465)

* Also respect readelf and objcopy cc-rs variants

While compiling servo for OpenHarmony on a MacOS host,
I noticed that readelf and objcopy apparently aren't chosen
from the same directory as the clang c compiler, but needed
to be in PATH for the configure script to pick them up.
To allow users to set READELF and OBJCOPY explicitly, we
should also read the relevant cc-rs environment variables.

An alternative would have been to inspect the configure scripts
and find out why they don't look next to clang, but I'm not
familiar enough with the configure script.

* Bump the sccache action from 0.0.3 to 0.0.4

Merge branch 'main' into mozjs_download

Fix tag variable

Merge pull request servo#31 from wusyong/ct

Update release tag name and check if exist before release

Merge pull request servo#29 from wusyong/rj

Update release jobs

Merge pull request servo#29 from wusyong/rj

Update release jobs

Merge pull request #1 from sagudev/mozjs_release

Mozjs release

Auto merge of servo#173 - servo:profiling, r=emilio

Add a cargo feature for profiling.

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