Add function declarations

Add function declarations

* lisp/emacs-lisp/byte-opt.el (side-effect-free-fns):
Add get-byte, string-width, unibyte-string, special-variable-p, frexp,
buffer-hash, buffer-line-statistics, load-average, md5, secure-hash,
string-collate-equalp, string-collate-lessp, string-to-unibyte,
string-version-lessp, current-cpu-time.
(side-effect-and-error-free-fns): Add equal-including-properties.
(pure-fns): Add equal-including-properties, string-version-lessp.
* lisp/emacs-lisp/bytecomp.el (important-return-value-fns):
Add match-data.
* lisp/subr.el (buffer-local-boundp, subr-primitive-p, gensym)
(frame-configuration-p, apply-partially, make-composed-keymap)
(keymap-canonicalize, listify-key-sequence, event-modifiers)
(event-basic-type, mouse-event-p, event-start, event-end)
(event-click-count, event-line-count, posnp, posn-window, posn-area)
(posn-point, posn-x-y, posn-col-row, posn-actual-col-row)
(posn-timestamp, posn-string, posn-image, posn-object)
(posn-object-x-y, posn-object-width-height, provided-mode-derived-p)
(derived-mode-p, autoloadp, locate-eln-file, symbol-file)
(process-lines-handling-status, process-lines)
(process-lines-ignore-status, process-get)
(copy-overlay, shell-quote-argument, field-at-pos):
Add appropriate function declarations.