options-parser: correctly quote shell meta-characters in arguments.

options-parser: correctly quote shell meta-characters in arguments.

When any argument contains a shell meta-character, it needs to be
quoted when passed around.  We already pass parameter lists as
space delimited strings of arguments, and pass the string through
eval to turn it back into a list before re-assigning using `set'.
To prevent the shell from interpreting any meta-characters during
an `eval set dummy $argumentlist', they must be quoted again
inside the quoted argument list.
* build-aux/funclib.sh (func_quote_for_eval): Be careful to keep
a separate tally of quoted and unquoted argument lists, to
conform to the API of the single argument func_quote_for_eval
implementation in build-aux/general.m4sh.
* bulid-aux/options-parser (func_run_hooks): To account for the
doubly quoted meta-character argument lists, we must eval the
parameter reassignment `set' call separately from evaluating the
dynamically named hook results variable.

Signed-off-by: Gary V. Vaughan <gary@gnu.org>