Move symbols in flymake-proc.el to separate namespace

Move symbols in flymake-proc.el to separate namespace

Every symbol in this flymake now starts with the prefix flymake-proc-.

Make obsolete aliases for (almost?) every symbol.

Furthermore, many flymake-proc.el symbols are prefixed with
"flymake-proc--", that is they were considered internal.

Some customization variables, interactive functions, and other symbols
considered useful to user customizations or third-party libraries are
considered "public" or "external" and so use a "flymake-proc-" prefix.

* lisp/progmodes/flymake-proc.el: Every symbol renamed.

* test/lisp/progmodes/flymake-tests.el
(flymake-tests--current-face): Use
flymake-proc-warning-predicate, not flymake-warning-predicate.

* lisp/progmodes/flymake-proc.el
(flymake-proc--get-project-include-dirs-function)
(flymake-proc--get-project-include-dirs-imp)
(flymake-proc--get-include-dirs-dot) (flymake-proc--get-tex-args)
(flymake-proc--find-make-buildfile)
(flymake-proc--get-syntax-check-program-args)
(flymake-proc--init-create-temp-source-and-master-buffer-copy)
(flymake-proc--init-find-buildfile-dir)
(flymake-proc--get-full-nonpatched-file-name)
(flymake-proc--get-full-patched-file-name) (flymake-proc--base-dir,
flymake-proc--temp-master-file-name) (flymake-proc--master-file-name)
(flymake-proc--temp-source-file-name)
(flymake-proc--delete-temp-directory) (flymake-proc--kill-process)
(flymake-proc--start-syntax-check-process)
(flymake-proc--compilation-is-running)
(flymake-proc--safe-delete-directory) (flymake-proc--safe-delete-file)
(flymake-proc--get-program-dir) (flymake-proc--restore-formatting)
(flymake-proc--clear-project-include-dirs-cache)
(flymake-proc--project-include-dirs-cache)
(flymake-proc--get-system-include-dirs)
(flymake-proc--get-project-include-dirs)
(flymake-proc--add-project-include-dirs-to-cache)
(flymake-proc--get-project-include-dirs-from-cache)
(flymake-proc--post-syntax-check) (flymake-proc--process-sentinel)
(flymake-proc--process-filter) (flymake-proc--create-master-file)
(flymake-proc--find-buffer-for-file)
(flymake-proc--copy-buffer-to-temp-buffer)
(flymake-proc--read-file-to-temp-buffer)
(flymake-proc--save-buffer-in-file) (flymake-proc--replace-region,
flymake-proc--check-include)
(flymake-proc--check-patch-master-file-buffer)
(flymake-proc--master-file-compare)
(flymake-proc--find-possible-master-files)
(flymake-proc--included-file-name, flymake-proc--same-files)
(flymake-proc--fix-file-name, flymake-proc--find-buildfile)
(flymake-proc--clear-buildfile-cache)
(flymake-proc--add-buildfile-to-cache)
(flymake-proc--get-buildfile-from-cache)
(flymake-proc--find-buildfile-cache)
(flymake-proc--get-real-file-name-function)
(flymake-proc--get-cleanup-function) (flymake-proc--get-init-function)
(flymake-proc--get-file-name-mode-and-masks)
(flymake-proc--processes): Rename to internal symbol from
flymake-proc- version.