Replacing some references to live-helper with live-build in debhelper bug files.

debian/live-build.bug-presubj

@@ -1,4 +1,4 @@
-Before submitting a bug report against live-helper, please make sure
+Before submitting a bug report against live-build, please make sure
 that you have read your guidlines for Debian Live bug reports:
 
   http://live.debian.net/manual/html/bugs.html

debian/live-build.bug-script

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-DEFAULT_SETTINGS="/etc/default/live-helper"
+DEFAULT_SETTINGS="/etc/default/live-build"
 
 # Checking depends
 dpkg -l debootstrap cdebootstrap