[PATCH] Fix "warning: fallthrough annotation does not directly precede switch label" in lambdas.

[Reid Kleckner]

================
Comment at: test/SemaCXX/switch-implicit-fallthrough.cpp:285
@@ +284,3 @@
+
+int fallthrough_targets(int n) {
+  [[clang::fallthrough]]; // expected-error{{fallthrough annotation is outside switch statement}}
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Why did this code have to move?  Aaron asked about it.

http://reviews.llvm.org/D4258