Signed-off-by: Nzhao_zhen_zhou <zhaozhenzhou@huawei.com>

with "make install -j8" it happens very often that two or more make
instances are creating the same directory in parallel. As a result one
instace creates the directory and second mkdir fails because the
directory exists already (but it did not while testing for it earlier).
Signed-off-by: NSebastian Andrzej Siewior <sebastian@breakpoint.cc>
Reviewed-by: NMatt Caswell <matt@openssl.org>
Reviewed-by: NRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1204)

Add copyright to most .pl files
This does NOT cover any .pl file that has other copyright in it.
Most of those are Andy's but some are public domain.
Fix typo's in some existing files.
Reviewed-by: NRichard Levitte <levitte@openssl.org>

NeXTstep creates a directory called -p); now mkdir-p.pl does its job.