hg: valhalla/valhalla: 8235690: [nestmates] InstanceKlass::signature_name returns incorrect hidden class name

[harold.seigel at oracle.com]

Changeset: b6402b9800be
Author:    hseigel
Date:      2019-12-17 19:31 +0000
URL:       https://hg.openjdk.java.net/valhalla/valhalla/rev/b6402b9800be

8235690: [nestmates] InstanceKlass::signature_name returns incorrect hidden class name
Summary: Add needed name mangling for hidden classes so right name gets returned
Reviewed-by: sspitsyn

! src/hotspot/share/oops/instanceKlass.cpp
+ test/hotspot/jtreg/serviceability/jvmti/HiddenClass/MyPackage/HiddenClassSigTest.java
+ test/hotspot/jtreg/serviceability/jvmti/HiddenClass/libHiddenClassSigTest.cpp