[clangd] Early return for #include goto definition.
[clangd] Early return for #include goto definition.

Summary: This would save cost of walking over the AST, NFC.

Reviewers: ilya-biryukov

Subscribers: klimek, jkorous-apple, cfe-commits, ioeric

Differential Revision: https://reviews.llvm.org/D44251

git-svn-id: a34e9779ed74578ad5922b3306b3d80a0c825546@327023 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/clang-tools-extra,llvm-mirror/clang-tools-extra,llvm-mirror/clang-tools-extra,llvm-mirror/clang-tools-extra