shit not in 1.90

Author: K4sum1

bootstrap.toml

@@ -53,8 +53,7 @@ strip = true
 optimize-tests = true
 thin-lto-import-instr-limit = 100
 validate-mir-opts = 3
-bootstrap-override-lld = "self-contained"
-parallel-frontend-threads = 0
+use-lld = "self-contained"
 debuginfo-level = 0
 debug-assertions = false
 #break-on-ice = false