* lisp/cedet/semantic/bovine/*.el: Use lexical-binding

* lisp/cedet/semantic/bovine/*.el: Use lexical-binding

* lisp/cedet/semantic/bovine/c.el: Use lexical-binding.
(semantic-lex-cpp-define): Remove unused var `name`.
(semantic-c-do-lex-if): Remove unused var `pt`.
(semantic-analyze-tag-references): Remove unused var `refs`.
(semantic-c-dereference-namespace): Remove unused vars `tmp` and
`usingname`.
(semantic-c-dereference-namespace-alias): Remove unused var `newtype`.
(semantic-c-check-type-namespace-using): Remove unused vars `tmp` and
`shortname`.
(semanticdb-find-table-for-include): Remove unused var `prefix`.
(semantic-default-c-setup, semantic-c-describe-environment):
Use `derived-mode-p`.

* lisp/cedet/semantic/bovine/debug.el: Use lexical-binding.

* lisp/cedet/semantic/bovine/make.el: Use lexical-binding.

* lisp/cedet/semantic/bovine/scm.el: Use lexical-binding.

* lisp/cedet/semantic/lex.el (define-lex-analyzer): Define the var (and
the function) in a single step.