Integrate rdkchronylibctrl library with systimemgr and add verification toolkit

[Copilot]

Adds rdkchronylibctrl (chrony control library) to systimemgr with complete build/runtime dependencies. Includes security hardening and comprehensive verification tools.

Integration

recipes-common/systimemgr/systimemgr_git.bb

DEPENDS = "... rdkchronylibctrl"           # Build-time: headers available
LDFLAGS:append = " -lchronyctl"            # Link-time: binary linkage
RDEPENDS:${PN} += "... rdkchronylibctrl"   # Runtime: .so deployed to target

All three required for complete shared library integration in Yocto.

recipes-support/rdkchronylibctrl/

• Library recipe and sources from topic/chrony-prd branch
• Fixes applied:
  • Socket permissions: 0666 → 0600
  • Removed duplicate FILES/RDEPENDS definitions
  • Fixed include path: ${S}/include → ${S}
  • Explicit null termination in strncpy

Verification Tools

Added 17+ verification methods across 4 docs (25KB total):

verify_library_linkage.sh - Automated 8-test script with color-coded output

./verify_library_linkage.sh
# Tests: binary deps, file existence, /proc/maps, pmap, package install

LIBRARY_LINKAGE_VERIFICATION.md - Complete reference covering:

• Static analysis: ldd, readelf, objdump, nm
• Runtime checks: /proc/PID/maps, pmap, pldd
• Build system: BitBake logs, dependency graphs
• Troubleshooting scenarios

Quick verification:

ls /usr/lib/libchronyctl.so && \
ldd /usr/bin/sysTimeMgr | grep chrony && \
cat /proc/$(pidof sysTimeMgr)/maps | grep chrony

Comparison with topic/chrony-prd

Base integration identical. This PR adds:

• SRCREV pinning, version metadata (1.4.0, PR=r0)
• Security fixes (permissions, string handling)
• Code quality (no duplicates, correct paths)
• Verification toolkit

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