Fix compiler name for QNX

[chachoi]

Proposed changes

Change compiler name from "QCC" to "qcc". QNX uses "qcc", not "QCC".

Types of changes

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• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Documentation content changes
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Checklist

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[grafikrobot]

/backport

[github-actions]

Successfully created backport PR for version/4.10.0:

• [Backport version/4.10.0] Fix compiler name for QNX #238