hg: amber/amber: more regression tests fixing

[vicente.romero at oracle.com]

Changeset: 800fac79fc02
Author:    vromero
Date:      2018-04-27 12:20 -0700
URL:       http://hg.openjdk.java.net/amber/amber/rev/800fac79fc02

more regression tests fixing

! src/java.base/share/classes/java/lang/invoke/constant/ConstantDescs.java
! src/java.base/share/classes/java/lang/invoke/constant/ConstantMethodHandleDesc.java
! src/java.base/share/classes/java/lang/invoke/constant/ConstantMethodTypeDesc.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/code/Symtab.java
! test/langtools/tools/javac/varargs/6806876/T6806876.out