hg: panama/dev: 8224013: jextract failed to generate source file under some scenarios

[henry.jen at oracle.com]

Changeset: cb9e1143513e
Author:    henryjen
Date:      2019-05-16 09:48 -0700
URL:       http://hg.openjdk.java.net/panama/dev/rev/cb9e1143513e

8224013: jextract failed to generate source file under some scenarios
Reviewed-by: mcimadamore

! src/jdk.jextract/share/classes/com/sun/tools/jextract/JavaSourceFactoryExt.java
! src/jdk.jextract/share/classes/com/sun/tools/jextract/Writer.java
! test/jdk/com/sun/tools/jextract/JextractToolProviderTest.java
+ test/jdk/com/sun/tools/jextract/TestSrcDump.java