set default to false

Co-authored-by: Onur Özkan <[email protected]>

Author: lucarlig

src/bootstrap/src/core/build_steps/tool.rs

@@ -1104,7 +1104,7 @@ pub struct TestFloatParse {
 impl Step for TestFloatParse {
     type Output = ();
     const ONLY_HOSTS: bool = true;
-    const DEFAULT: bool = true;
+    const DEFAULT: bool = false;
 
     fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
         run.path("src/etc/test-float-parse")