Build timeouts Lagom

```
Jun 24 05:19:56 librarybuilder librarycpp.build 2024-06-24 03:19:56,433 lib.installable.installable INFO Building lagom trunk for [g133,,/opt/compiler-explorer/gcc-13.3.0,Linux,Debug,x86_64,,,]
Jun 24 05:29:56 librarybuilder librarycpp.build 2024-06-24 03:29:56,823 lib.installable.installable INFO Build timed out and was killed (/tmp/staging/e3a6457c-461a-4620-b497-9b2f6207e73f/g133_0a5bb2170da7c8b78428ebcaeec3a90f082fe46076d4e8de377d300fcf13ccb3)
```

Killed after 10 minutes.
x86 builds seem to work fine and finish within a minute

Start with the librarycpp.build and lib.installable.installable entries shown in the build log, then compare the timed-out Lagom trunk build with the working x86 build. Confirm why the Linux x86_64 Debug build reaches the ten-minute limit, and consider the issue done when Lagom builds successfully without regressing the reported x86 behavior.

Written by the indexing model from the issue text.