downgrade compiler_builtins

The outline-atomics support in compiler_builtins messed up and wasn't limited to linux only.
https://github.com/rust-lang/compiler-builtins/pull/532/files#r1249354225

Author: Noratrieb

Cargo.lock

@@ -700,9 +700,9 @@ dependencies = [
 
 [[package]]
 name = "compiler_builtins"
-version = "0.1.94"
+version = "0.1.93"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f4ceb2be7a1b493d08a8908fdc2555921b28f3daef84d518ea9ed7d336f852f2"
+checksum = "76630810d973ecea3dbf611e1b7aecfb1012751ef1ff8de3998f89014a166781"
 dependencies = [
  "cc",
  "rustc-std-workspace-core",

library/std/Cargo.toml

@@ -18,7 +18,8 @@ panic_unwind = { path = "../panic_unwind", optional = true }
 panic_abort = { path = "../panic_abort" }
 core = { path = "../core", public = true }
 libc = { version = "0.2.146", default-features = false, features = ['rustc-dep-of-std'], public = true }
-compiler_builtins = { version = "0.1.93" }
+# FIXME(Nilstrieb): https://github.com/rust-lang/compiler-builtins/pull/532/files#r1249354225
+compiler_builtins = { version = "=0.1.93" }
 profiler_builtins = { path = "../profiler_builtins", optional = true }
 unwind = { path = "../unwind" }
 hashbrown = { version = "0.14", default-features = false, features = ['rustc-dep-of-std'] }