Configure for Gentoo

Patch by Thilo Bangert
http://bugs.gentoo.org/show_bug.cgi?id=90073

--- clockspeed-conf
+++ clockspeed-conf
@@ -15,6 +15,7 @@
 #ADJUST_LOGDIR  defaults to main
 #VA=yes   shortcut for 'ADJUST_LOGDIR=clockspeed-adjust'
 #
+CLOCKSPEED_INSTALLATION="GENTOO"
 [ -z "${CLOCKSPEED_INSTALLATION}" ] && CLOCKSPEED_INSTALLATION="DJB"
 
 PATH=/usr/sbin:/sbin:/usr/local/bin:/usr/bin:/bin:/command:${PATH}
@@ -106,6 +107,10 @@
 	BINDIR="${PREFIX}/clockspeed/bin"
 	ADJUSTFILE="${PREFIX}/clockspeed/adjust"
 	;;
+	GENTOO)
+	ETCDIR="/var/lib/clockspeed"
+	BINDIR="/usr/bin"
+	;;
     custom)
         # we expect ETCDIR and BINDIR from environment !!!
         ;;
