[Bug] td-shim should support reproducible build

[liuw1]

There are some differences between 2 times build with same code base. Currently td-shim does not support reproducible build.

[jiangliu]

It's really import to get this fixed, reproducible build is fatal for CC:)
Thanks for working this!

[jyao1]

Some investigation result from @longlongyang.

Elements break reproducible build (x86_64-unknown-uefi + target x86_64-unknown-none)

1. Debug related sections (PE + ELF)
2. Code base path like \home\long\rust-tpa\xxx\xxx.rs (PE + ELF)
3. CARGO_HOME like \home\long.cargo\xxx\xxx.rs (PE + ELF)
4. RUSTUP_HOME like \home\long.rustup\xxx\xxx.rs (PE + ELF)
5. TimeDateStamp field in COFF file header (PE only)

Solution:

1. Use strip = "symbols" option to [profile.release]
2. Use strip = "symbols" option to [profile.release]
3. Use a post-build tool to zero CARGO_HOME string
4. Use a post-build tool to zero RUSTUP_HOME string
5. Use a post-build tool to zero TimeDateStamp for PE

NOTE: 3 and 4 may be resolved directly after rust-lang RFC 3127. It is temp solution before RFC is implemented.

[longlongyang]

I would like to take this issue.

[jyao1]

After more investigation, we notice that Use strip = "symbols" option to [profile.release] is not stable.

It is just added in latest 1.59 version - #269.

And it causes weird issue - #272

As such, I think we need use post-build tool to resolve 1 and 2 as well.

After the tool is stable, we can use strip again.