NFC: Add .vscode to .gitignore

llvm-svn: 348209
diff --git a/clang/.gitignore b/clang/.gitignore
index f8532b8..3ea38b6 100644
--- a/clang/.gitignore
+++ b/clang/.gitignore
@@ -36,3 +36,8 @@
 docs/analyzer/_build
 # debug info testsuite
 test/debuginfo-tests
+
+# VS2017 and VSCode config files.
+.vscode
+.vs
+