hg: panama/dev: Converted JextractToolProviderTest as a testng test and added more tests

[sundararajan.athijegannathan at oracle.com]

Changeset: 5b1ba777c606
Author:    sundar
Date:      2018-02-26 19:30 +0530
URL:       http://hg.openjdk.java.net/panama/dev/rev/5b1ba777c606

Converted JextractToolProviderTest as a testng test and added more tests
Reviewed-by: mcimadamore

! test/jdk/com/sun/tools/jextract/JextractToolProviderTest.java
+ test/jdk/com/sun/tools/jextract/hello.h