Integrate libchronyctl.so as chrony time source

[Copilot]

Adds chrony as a configurable time source via libchronyctl.so library integration.

Changes

New Time Source

• systimerfactory/chronytimesrc.h - ChronyTimeSrc class implementing ITimeSrc interface
• Factory integration in timerfactory.cpp for type="chrony"
• Currently uses clock_gettime() placeholder; actual libchronyctl API calls require library documentation

Build System

• Added --enable-chrony configure flag (both top-level and systimerfactory)
• Conditional compilation via CHRONY_ENABLED macro
• Links -lchronyctl when enabled

Configuration

# In systemtimemgr config file
timesrc chrony ""

Build

./configure --enable-chrony
make

Implementation Note

Follows existing time source patterns (NTP, DTT, DRM) with conditional compilation. Placeholder implementation allows build integration now; replace clock_gettime() with libchronyctl API when available.

Note: Only systemtimemgr repository modified. No meta-rdk changes included in this PR.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• chrony.tuxfamily.org
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node /home/REDACTED/work/_temp/ghcca-node/node/bin/node --enable-source-maps /home/REDACTED/work/_temp/copilot-developer-action-main/dist/index.js (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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