hg: build-infra/jdk8: In BASIC_FIXUP_EXECUTABLE, if we have an absolute path but which fails, use the absolute path.

[magnus.ihse.bursie at oracle.com]

Changeset: 1403af6284f3
Author:    ihse
Date:      2012-10-26 12:11 +0200
URL:       http://hg.openjdk.java.net/build-infra/jdk8/rev/1403af6284f3

In BASIC_FIXUP_EXECUTABLE, if we have an absolute path but which fails, use the absolute path.

! common/autoconf/basics.m4
! common/autoconf/generated-configure.sh