hg: code-tools/jtreg: 2 new changesets

[alexey.fedorchenko at oracle.com]

Changeset: 98954d23271b
Author:    afedorch
Date:      2018-03-26 11:11 -0700
URL:       http://hg.openjdk.java.net/code-tools/jtreg/rev/98954d23271b

build-all.sh: update the latest JCov version
Reviewed-by: jjg

! make/build-all.sh

Changeset: d8152011e008
Author:    afedorch
Date:      2018-03-26 11:16 -0700
URL:       http://hg.openjdk.java.net/code-tools/jtreg/rev/d8152011e008

build-all.sh: minor changes to make the script less environment dependent
Reviewed-by: jjg

! make/build-all.sh