Merge pull request #636 from FearlessTobi/add-gitignore

Port #3513 (partly) from Citra: .gitignore: Add CMakeLists.txt.user to Project/editor files

.gitignore

@@ -11,6 +11,7 @@ src/common/scm_rev.cpp
 .idea/
 .vs/
 .vscode/
+CMakeLists.txt.user
 
 # *nix related
 # Common convention for backup or temporary files