Allow annotation on an assignment

A DESCRIPTION OF THE REQUEST :
Add ASSIGNMENT to the the allowed targets (i.e. ElementType) for an annotation.

JUSTIFICATION :
When using SuppresWarnings, it is desirable to use the smallest scope possible. Often, for "unchecked" this occurs on a variable assignment.

Currently, only a DECLARATION target is allowed. There are situations where warning suppression is required for an assignment that is NOT a declaration.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Should be able to associate an annotation with a variable assignment.
ACTUAL -
Can only associate an annotation with an assignment that is part of a declaration.