regression fix for rc.postlocal

[Baxxy13]

Description

• fixes a regression between etc/config/safemode and /usr/local/etc/rc.postlocal
• now, rc.postlocal should no longer executed if we are in safemode

Related Issue

#2447 (comment)

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (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 change)

Alternate Designs

Possible Drawbacks

If we are booting in safemode and S99SetupLEDs isn't starting correctly, then etc/config/safemode will not be removed.

Verification Process

Implemented this change on my RaspberryMatic Testsystem and booted in Safemode and Normalmode.
Execution of /usr/local/etc/rc.postlocal will now correctly suppressed if the system boots in Safemode.

Release Notes

Regression fix for rc.postlocal which now prevents correctly the execution in safemode.

Contributing checklist

• My code follows the code style of this project.
• I have read the CONTRIBUTING and LICENSE document.
• I fully agree to distribute my changes under Apache 2.0 license.