changes: file for 31919

changes/ticket31919

+  o Minor features (developer tools):
+    - Add a check_cocci_parse.sh script that checks that new code
+      is parseable by Coccinelle. Add an exceptions file for unparseable
+      files. Closes ticket 31919.
+    - Call the check_cocci_parse.sh script from a 'check-cocci' Makefile
+      target. Closes ticket 31919.
+  o Minor features (git scripts):
+    - Call the check_cocci_parse.sh script from the git commit and push hooks.
+      Closes ticket 31919.
+    - Skip unmodified source files when doing some existing git hook checks.
+      Related to ticket 31919.
+  o Minor features (continuous integration):
+    - Call the check_cocci_parse.sh script from Travis CI. Closes ticket 31919.