improve logcat init script

ChangeLog.md

@@ -13,7 +13,8 @@
          * updated Credits section in README
          * extended by FAKE_SIGNATURE permission for microG Gms Core and Play Store
          * removed NewPipe from microG permissions file
-  * Full, microG packages
+  * Full package
+     * logcat init script removes all logcats older than 7 days upon reboot to prevent pollution
   * nanodroid-overlay Script
      * add `-U`, `--update-apks` switch to nanodroid-overlay script, downloads and installs latest versions of custom NanoDroid apks, requires Busybox to be installed (for wget applet)
          * Fake Store

Full/system/etc/init.d/logcat

@@ -4,4 +4,7 @@ CURDATE=$(date +%Y%m%d-%I.%M.%S)
 
 [[ ! -d /data/adb/logcat ]] && mkdir -p /data/adb/logcat
 
+# remove files older than a week to prevent pollution
+find /data/adb/logcat/ -mtime +8 -exec rm -f {} \;
+
 logcat | tee -a "/data/adb/logcat/${CURDATE}"