codecheckignore: add STM32Cube_FW

Author: jeromecoutant

.codecheckignore

@@ -34,3 +34,4 @@
 ^storage/blockdevice/tests/UNITTESTS
 ^storage/kvstore/tests/UNITTESTS
 ^drivers/tests/UNITTESTS
+STM32Cube_FW

.travis.yml

@@ -67,6 +67,7 @@ matrix:
         - >-
             git diff --name-only --diff-filter=ad FETCH_HEAD..HEAD \
               | ( grep '.\(c\|cpp\|h\|hpp\|py\)$' || true ) \
+              | ( grep -v -f .codecheckignore || true ) \
               | ( grep -v '^tools/test/toolchains/api_test.py' || true ) \
               | while read file; do cp --parents "${file}" SCANCODE; done
         - scancode -l --json-pp scancode.json SCANCODE