[PATCH] Tune capturing of init-captures in non-generic lambdas

[Faisal Vali]

  *ping*
  clang claims to have (draft) C++14 support - but currently somewhat embarrassingly ICE's if init-captures are used within nested lambdas.
     int i = 4;
     auto L = [&j = i](auto a) {
      return [k = j]() { return k; };
     };
     L(8)(); <-- ICE!

  This patch places fixes that bug and places the conformance claim on even firmer footing - so, feedback would be appreciated :)

http://llvm-reviews.chandlerc.com/D2092