hg: amber/amber: renaming after the change of TrackableConstant to Foldable

[vicente.romero at oracle.com]

Changeset: 47ea1a11205e
Author:    vromero
Date:      2018-01-12 11:08 -0500
URL:       http://hg.openjdk.java.net/amber/amber/rev/47ea1a11205e

renaming after the change of TrackableConstant to Foldable

! src/jdk.compiler/share/classes/com/sun/tools/javac/code/Symtab.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/util/Constables.java