[Packages / Bug Fix] Fixed bug in fpmkunit's TBuildEngine.NeedsCompile where CompileReason wasn't set

Summary

Thanks to being identified in !668 (merged), this merge request fixes a bug in the fpmkunit unit where, in two instances, an informative string variable wasn't set because it appeared after a Break statement.

What is the current bug behavior?

An informative string variable was left undefined.

What is the behavior after applying this patch?

The string variable is now set after relocating the relevant statements to before the Break statements.