include x and x.ps1 scripts in tarball sources

Helps to provide 1:1 build experience between git-managed and tarball sources.

Signed-off-by: onur-ozkan <[email protected]>

Author: onur-ozkan

src/bootstrap/src/core/build_steps/dist.rs

@@ -1007,7 +1007,9 @@ impl Step for PlainSourceTarball {
             "README.md",
             "RELEASES.md",
             "REUSE.toml",
+            "x.ps1",
             "x.py",
+            "x",
             // tidy-alphabetical-end
         ];
         let src_dirs = ["src", "compiler", "library", "tests", "LICENSES"];