EPE-98 Update signing certificate (2014)

Tweak batch file to use passphrase.txt inline with ECL IDE and ClientTools.

Fixes EPE-98

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>
Merge pull request #140 from GordonSmith/EPE-98

EPE-98 Update signing certificate (2014)

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>