[clang-format] Fix line parsing for noexcept lambdas

Summary:
> $ echo "int c = [b]() mutable noexcept { return [&b] { return b++; }(); }();" |clang-format

```
int c = [b]() mutable noexcept {
  return [&b] { return b++; }();
}
();
```
with patch:
> $ echo "int c = [b]() mutable noexcept { return [&b] { return b++; }(); }();" |bin/clang-format
```
int c = [b]() mutable noexcept { return [&b] { return b++; }(); }();
```

Contributed by hultman.

Reviewers: benhamilton, jolesiak, klimek, Wizard

Reviewed By: benhamilton

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D56909

llvm-svn: 352622
diff --git a/clang/lib/Format/UnwrappedLineParser.cpp b/clang/lib/Format/UnwrappedLineParser.cpp
index 636e2e1..f6727fc 100644
--- a/clang/lib/Format/UnwrappedLineParser.cpp
+++ b/clang/lib/Format/UnwrappedLineParser.cpp
@@ -1422,6 +1422,7 @@
     case tok::numeric_constant:
     case tok::coloncolon:
     case tok::kw_mutable:
+    case tok::kw_noexcept:
       nextToken();
       break;
     case tok::arrow: