[eclipse-pmc] API addition in JDT/Core

[Olivier Thomann <Olivier_Thomann@xxxxxxxxxx>]

GOALS/BENEFITS:
- Allow users to get more information about bindings even if the code 
contains unresolved types. The DOM/AST API could propose incomplete 
bindings that could be used in case like quickfix, organize imports or 
refactoring.

CORRESPONDING BUG(S): 

https://bugs.eclipse.org/bugs/show_bug.cgi?id=149567

RISKS:

No risk

PERFORMANCE IMPACTS:

This doesn't affect existing APIs.

Olivier