rubygems/rubygems — pull request #587 by domcleal (2013-07-08 22:03:44+00:00)
Title: Remove siteconf temp file once unused

Clean up the sitearch temp file before running any make commands to prevent
the temp file being copied into the gem installation.

Doing an install of the 'mysql' gem leads to something like this being installed:

/usr/local/share/gems/gems/mysql-2.9.1/ext/mysql_api/siteconf20130708-4079-k7iv3m.rb