[llvm] [Release] Build compiler-rt during Phase 1 on AIX (PR #70672)

[via llvm-commits]

================
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+u!/usr/bin/env bash
----------------
azhan92 wrote:

Oh yes, thanks for pointing it out

https://github.com/llvm/llvm-project/pull/70672