Add cmake-build-* folders to the .gitignore file (ros2#1001)

It could be more custom build configurations rather than debug and
release. Exclude all of them from git tree with regex.

Signed-off-by: Michael Orlov <[email protected]>

Author: morlov-apexai

.gitignore

@@ -1,7 +1,6 @@
 .idea/
 .ipynb_checkpoints/
-cmake-build-debug/
-cmake-build-release/
+cmake-build-*/
 build/
 venv/
 **/.pytest_cache/