Prevent Courgette from choosing a really large executable as the basis of comparison for a small executable.
Prevent Courgette from choosing a really large executable as the basis of comparison for a small executable.

Patch by sra@chromium.org.

BUG= none
TEST= diff installer creation succeeds.
Review URL: http://codereview.chromium.org/3431029

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@60591 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser