wiki: Add script for syncing kernel versions with GitHub

Maintainers are sometimes upgrading their kernels...

Change-Id: I29de6f1219427b4c39c3be85fe2472aa59b20637

scripts/sync_kernel_versions.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+for f in _data/devices/*.yml; do
+    repo=$(yq '.kernel.repo' $f)
+    current_branch=$(yq '.current_branch' $f)
+
+    if [ "${current_branch::2}" -gt 14 ]; then
+        current_branch="lineage-$current_branch"
+    else
+        current_branch="cm-$current_branch"
+    fi
+
+    version=$(curl -s https://raw.githubusercontent.com/LineageOS/$repo/$current_branch/Makefile | grep -E '^(VERSION|PATCHLEVEL)')
+    version=$(echo "$version" | xargs echo | awk '{ print $3"."$6 }')
+
+    sed -i "s/^kernel:.*/kernel: {repo: $repo, version: '$version'}/" $f
+done