RFR: JDK-8170279: Langtools test/Makefile ignores failed tests

[Tim Bell]

Erik:

> After JDK-8167354, when a test fails in jtreg, the langtools
> test/Makefile ignores the result and exits with 0. This causes (at
> least) JPRT jobs to not fail when langtools tests fail. The reason for
> this is the added "| tee" construct which overrides the exit value from
> jtreg.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8170279
>
> Webrev: http://cr.openjdk.java.net/~erikj/8170279/webrev.langtools.01/

Good catch.  Looks good to me.

Tim