Make file formatting comply with POSIX standards (#3242)

Add newlines to two files
diff --git a/examples/cpp-interface/CMakeLists.txt b/examples/cpp-interface/CMakeLists.txt
index d050b07..7887ee7 100644
--- a/examples/cpp-interface/CMakeLists.txt
+++ b/examples/cpp-interface/CMakeLists.txt
@@ -16,4 +16,4 @@
   TARGET spirv-tools-cpp-example
   SRCS main.cpp
   LIBS SPIRV-Tools-opt
-)
\ No newline at end of file
+)
diff --git a/utils/vscode/extension.js b/utils/vscode/extension.js
index f220172..e7fec28 100644
--- a/utils/vscode/extension.js
+++ b/utils/vscode/extension.js
@@ -63,4 +63,4 @@
 // this method is called when your extension is deactivated
 function deactivate() {
 }
-exports.deactivate = deactivate;
\ No newline at end of file
+exports.deactivate = deactivate;