Update .gitignore (#176)

Co-authored-by: coreglitch <mail@s3f.ru>

.gitignore

@@ -7,4 +7,9 @@ bindings/
 .mxproject
 
 # Visual Studio Code
-.vscode/
+.vscode/
+
+# legendary cmake's
+build
+CMakeLists.txt
+firmware/targets/f2/CMakeLists.txt