hg: code-tools/jtreg: support alternate locations for grep, sed

[jonathan.gibbons at oracle.com]

Changeset: 72e0db704418
Author:    jjg
Date:      2013-11-12 15:56 -0800
URL:       http://hg.openjdk.java.net/code-tools/jtreg/rev/72e0db704418

support alternate locations for grep, sed

! make/Defs.gmk