hg: build-infra/jdk8: Fixed execute permissions. Not sure how that happened. The autoconf directory has some files with execute permission too... That wasn't me... :)

[kelly.ohair at oracle.com]

Changeset: 04b03e94b06e
Author:    ohair
Date:      2012-09-06 15:17 -0700
URL:       http://hg.openjdk.java.net/build-infra/jdk8/rev/04b03e94b06e

Fixed execute permissions. Not sure how that happened.  The autoconf directory has some files with execute permission too... That wasn't me...  :)