[PATCH libgpg-error] Add patch to support IBM z/OS

[NIIBE Yutaka]

Hello,

Sachin T wrote:
> This patch provides two z/OS fixes:
>
>   1.
> configure.ac:

I leave this part to Werner or others.  Just I wonder if the
use/dependency to pkg-config is OK for your system.

>   2.
> src/spawn-posix.c: rename the gpgrt_spawn_actions member environ to env.

I applied this, modifying the field to "envp".  That's because it's not
a pointer to an environment variable, but an array of pointers to
strings.

I pushed the commit:
	26d740f940b3cbda43e0b06a45c86f21ebc236ed
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