Add lm-sensors to the bootstrap

Change-Id: If7a1ba054e59782e7409e33ff2465d65a1dc7240
diff --git a/preamble.mk b/preamble.mk
index a954c52..57c678b 100644
--- a/preamble.mk
+++ b/preamble.mk
@@ -58,6 +58,7 @@
 	libswitch-perl \
 	libxcb-composite0 \
 	libxcb-shape0 \
+	lm-sensors \
 	locales \
 	logrotate \
 	lrzsz \