* ld-elfvsb/elfvsb.exp (support_protected): New variable. Check
and set to "yes" if the protected visibility is expected to
pass.
(visibility_run): Set expected to fail for the "protected"
and "protected_undef_def" tests only if $support_protected is
"no".
* ld-elfvsb/main.c (PROTECTED_CHECK): Check for the protected
visibility support if defined.
* ld-elfvsb/elfvsb.exp (visibility_run): Set expected failure
for "protected_undef_def".
* ld-elfvsb/main.c: Don't define HIDDEN_UNDEF_TEST when
PROTECTED_WEAK_TEST is defined.
Don't define PROTECTED_UNDEF_TEST when PROTECTED_WEAK_TEST is
defined.
Define PROTECTED_TEST when PROTECTED_UNDEF_TEST is defined.
* ld-elfvsb/sh1.c (visibility): Mark protected only if
PROTECTED_TEST, PROTECTED_UNDEF_TEST or PROTECTED_WEAK_TEST
is defined.
(visibility_var): Likewise.
