Add a new predicate that tests if string contains any characters that succeed
for a given test predicate.
library/string.m:
Add the new predicate.
compiler/options.m:
Replace the predicate string_contains_whitespace/1 defined here
with a call to the new library predicate.
NEWS:
Announce the new predicate.
tests/hard_coded/Mmakefile:
tests/hard_coded/string_contains_match.{m,exp}:
Add a test of the new predicate.
