Enable feature(asm_experimental_arch) for tests

This is needed to use `probe!` on ppc64le and s390x

See rust-lang/rust#93335

Also loosen version requirement on `probe`; on Fedora we have been
building with `probe` 0.5.1 with no issue.

Tested by doing a scratch build on Fedora's Koji build system:

https://koji.fedoraproject.org/koji/taskinfo?taskID=123358009

Signed-off-by: Michel Lind <[email protected]>

Author: michel-slm

libbpf-rs/Cargo.toml

@@ -48,7 +48,7 @@ libbpf-rs = {path = ".", features = ["generate-test-files"]}
 log = "0.4.4"
 memmem = "0.1.1"
 plain = "0.2.3"
-probe = "0.3"
+probe = ">=0.3, <0.6"
 scopeguard = "1.1"
 serial_test = { version = "3.0", default-features = false }
 tempfile = "3.3"

libbpf-rs/tests/test.rs

@@ -1,3 +1,4 @@
+#![feature(asm_experimental_arch)]
 #![allow(clippy::let_unit_value)]
 #![warn(clippy::absolute_paths)]