[bash-5.1-rc2.] Do not leave /tmp/fchist-nnnn, please.

[Kiyoshi KANAZAWA]

Hello,
Testing bash-5.1-rc2.
make & make check passed, but /tmp/fchist-nnnn is made and not removed in make 
check (nnnn seems to be precess id).

Environment:
$ uname -a
SunOS hidden 5.11 11.3 i86pc i386 i86pc

$ gcc --version
gcc (GCC) 10.2.0


Regards,

--- Kiyoshi