…sts, r=wesleywiser

Group commandline tests in a directory

I grouped the `ui/command*` tests in `ui/command/argfile/` and `rustdoc-ui/command*` in `rustdoc-ui/commandline-argfile/`.

…-Simulacrum

Fix standard library test with read_link

closes rust-lang#90669
resolve this issue by comparing between Paths instead of strs

Android is not GNU

For a long time, the Android targets had `target_env=""`, but this changed to `"gnu"` in Rust 1.49.0. I tracked this down to rust-lang#77729 which started setting `"gnu"` in the `linux_base` target options, and this was inherited by `android_base`. Then rust-lang#78929 split the env into `linux_gnu_base`, but `android_base` was also changed to follow that. Android was not specifically mentioned in either pull request, so I believe this was an accident. Moving it back to `linux_base` will use an empty `env` again.

r? `@Mark-Simulacrum`
cc `@petrochenkov`

…li-obk

fix ICE on Miri/CTFE copy of half a pointer

Fixes rust-lang/miri#1910
r? ``@oli-obk``

Remove workaround for the forward progress handling in LLVM

this workaround was only needed for LLVM < 12 and the minimum LLVM version was updated to 12 in rust-lang#90175

…orkingjubilee

disable portable SIMD tests in Miri

Until rust-lang/miri#1912 is resolved, we'll have to skip these tests in Miri.