debootstrap: Fix a package name.

Change-Id: I07a42f1f5b11f1c677549dc37385aac440bb1eb4
diff --git a/preamble.mk b/preamble.mk
index a2669c1..be17ccf 100644
--- a/preamble.mk
+++ b/preamble.mk
@@ -37,7 +37,7 @@
 	gstreamer1.0-plugins-good \
 	gstreamer1.0-tools \
 	hdparm \
-	i2ctools \
+	i2c-tools \
 	ifupdown \
 	init \
 	iptables \