Fix build_modules for AOT.

[davidmorgan]

Fix #4259

[github-actions]

PR Health

Changelog Entry ✔️

Package	Changed Files

Changes to files need to be accounted for in their respective changelogs.

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[github-actions]

Package publishing

Package	Version	Status	Publish tag (post-merge)
package:build	4.0.2	already published at pub.dev
package:build_config	1.2.0	already published at pub.dev
package:build_daemon	4.1.1	already published at pub.dev
package:build_modules	5.1.2	ready to publish	build_modules-v5.1.2
package:build_runner	2.10.3	already published at pub.dev
package:build_test	3.5.3	already published at pub.dev
package:build_web_compilers	4.4.2	already published at pub.dev
package:scratch_space	1.2.0	already published at pub.dev

Documentation at https://github.com/dart-lang/ecosystem/wiki/Publishing-automation.

[Markzipan]

LGTM!