test: convert version_check ui test to run-make

else it breaks with `rpath=false`.

Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>

tests/run-make/version-check/rmake.rs

@@ -0,0 +1,13 @@
+use run_make_support::bare_rustc;
+
+fn main() {
+    let signalled_version = "Ceci n'est pas une rustc";
+    let rustc_out = bare_rustc()
+        .env("RUSTC_OVERRIDE_VERSION_STRING", signalled_version)
+        .arg("--version")
+        .run()
+        .stdout_utf8();
+
+    let version = rustc_out.strip_prefix("rustc ").unwrap().trim_end();
+    assert_eq!(version, signalled_version);
+}

tests/ui/feature-gates/version_check.rs

@@ -1,17 +0,0 @@
-//@ run-pass
-//@ only-linux
-//@ only-x86
-// FIXME: this should be more like //@ needs-subprocesses
-use std::process::Command;
-
-fn main() {
-    let signalled_version = "Ceci n'est pas une rustc";
-    let version = Command::new(std::env::var_os("RUSTC").unwrap())
-        .env("RUSTC_OVERRIDE_VERSION_STRING", signalled_version)
-        .arg("--version")
-        .output()
-        .unwrap()
-        .stdout;
-    let version = std::str::from_utf8(&version).unwrap().strip_prefix("rustc ").unwrap().trim_end();
-    assert_eq!(version, signalled_version);
-}