.gitignore: .vscode/settings.json & .vscode/launch.json

This is per-user data and can easily contain paths to directories outside of the project.

Also remove .vscode/launch.json.

Change-Id: Iefedc52ec8446d4b6de5e6026761359ac9ac1a0f
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/28069
Presubmit-Ready: Ben Clayton <bclayton@google.com>
Tested-by: Ben Clayton <bclayton@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
diff --git a/.gitignore b/.gitignore
index 6362020..20a8cc2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,6 +8,10 @@
 .vscode/ipch
 CMakeFiles/
 
+# Per user vscode config files.
+.vscode/launch.json
+.vscode/settings.json
+
 # The /build/ directory is recommended for CMake build output and should be
 # ignored, except for Visual Studio project files that we check into the
 # repository and regenerate with build/cmake.sh