hg: panama/dev: 8221336: jextract generates invalid package name for header file in a subfolder

[henry.jen at oracle.com]

Changeset: b6899301406e
Author:    henryjen
Date:      2019-03-25 08:39 -0700
URL:       http://hg.openjdk.java.net/panama/dev/rev/b6899301406e

8221336: jextract generates invalid package name for header file in a subfolder
Reviewed-by: sundar

! src/jdk.jextract/share/classes/com/sun/tools/jextract/HeaderResolver.java
! test/jdk/com/sun/tools/jextract/test8221154/SrcGenTest.java
! test/jdk/com/sun/tools/jextract/test8221154/srcgentest.h
+ test/jdk/com/sun/tools/jextract/test8221154/sub/dupname.h