gitignore: ignore VS Code editor files

Summary: VS code creates .vscode folder to keep its stuff that we really don't need in git.

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D24211

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@280551 91177308-0d34-0410-b5e6-96231b3b80d8

.gitignore

@@ -60,6 +60,8 @@ tools/llgo
 tools/polly
 # Sphinx build tree, if building in-source dir.
 docs/_build
+# VSCode config files.
+.vscode
 
 #==============================================================================#
 # Files created in tree by the Go bindings.