Pass --no-pager to git log command.

Without --no-pager, this command can (depending on the user's pager
settings) cause build.sh to show just a full screen git log in the
user's pager (for example, if PAGER="less -Cemf").  This behavior is
unexpected, and it seems like the intended behavior here is to have the
git log appear as a continuous part of the output.

build.sh

@@ -229,7 +229,7 @@ function checkHTMLBuildIsUpToDate {
     echo -n "Your local branch is $new_commits "
     [[ $new_commits == "1" ]] && echo -n "commit" || echo -n "commits"
     echo " behind $origin_url:"
-    git log --oneline HEAD..FETCH_HEAD
+    git log --no-pager --oneline HEAD..FETCH_HEAD
     echo
     echo "To update, run this command:"
     echo