gdb/gnulib: Revert rename(2) workaround for now

gdb/gnulib: ``guess yes'' to rename(2) checks for NetBSD

Otherwise, rename(2) gets replaced by gnulib version for mknative
(i.e., cross compile), which results build failure for clang.

Confirmed that all rename(2) tests successfully passed at least on
amd64. Even if they will fail, it is our responsibility to fix them,
not gdb, anyway.

XXX
Edit configure by hand, rather than regen it, in order to avoid
subtle huge diffs from upstream, which come from autoconf version
mismatch.

XXX XXX
For gcc, replacement for rename(2) lost by cstdio, which forcibly
undefs all stdio functions. This should be an unintended behavior.

One of cstdio comes from our local change for c++locale.h, but
even if it is dropped, cstdio is included from elsewhere.

Merge gdb-13.2; last was 11.0.50. Builds but does not run.

Provide better guesses for bsd systems, otherwise we end up calling
recursively opendir and gettimeofday until we run out of stack...

branches: 1.1.1;
Initial revision

Merge gdb-13.2; last was 11.0.50. Builds but does not run.

Provide better guesses for bsd systems, otherwise we end up calling
recursively opendir and gettimeofday until we run out of stack...

branches: 1.1.1;
Initial revision

Provide better guesses for bsd systems, otherwise we end up calling
recursively opendir and gettimeofday until we run out of stack...

branches: 1.1.1;
Initial revision