Fix incorrect results from std::boyer_moore_searcher
* include/std/functional (default_searcher, __boyer_moore_array_base)
(__is_std_equal_to, __boyer_moore_base_t, boyer_moore_searcher)
(boyer_moore_horspool_searcher): Remove redundant namespace
qualification.
(default_searcher::operator()): Construct return value early and
advance second member in-place.
(boyer_moore_horspool_searcher::operator()): Increment random access
iterator directly instead of using std::next.
(boyer_moore_searcher::operator()): Fix return value.
* testsuite/20_util/function_objects/searchers.cc: Check both parts
of return values.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@246964 138bc75d-0d04-0410-961f-82ee72b054a4