Update .gitignore files

* Ignore build-debug (this is a common sub-directory for debug builds).
* Ignore .cache (this is a clangd LSP directory
* Ignore compile_commands (can be generated by CMake used by LSP
  clients)
* Update copyright date.

Signed-off-by: Jack Frankland <jack.frankland@arm.com>
Change-Id: I74a5bc8c03f51e2d534d4870b58d477e830f6f42
diff --git a/.gitignore b/.gitignore
index 6674c8c..e861e24 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,8 +1,11 @@
-# Copyright (c) 2021-2022 Arm Limited.
+# Copyright (c) 2021-2023 Arm Limited.
 # SPDX-License-Identifier: Apache-2.0
 
 __pycache__/
 build/
+build-debug/
+.cache
+compile_commands.json
 dist/
 *.egg-info
 verif/tests/test-result-*.tests.tosa_mock_sut_run.npy
@@ -10,4 +13,4 @@
 .coverage
 result.xml
 vtest/
-examples/*/*/out.npy
\ No newline at end of file
+examples/*/*/out.npy