Backport ecl long pathname fix

[vbraun]

This is because current_dir() checks for ENAMETOOLONG, but the actual errno is ERANGE.

https://gitlab.com/embeddable-common-lisp/ecl/issues/258

Upstream: Fixed upstream, but not in a stable release.

CC: @kiwifb

Component: packages: standard

Author: François Bissey

Branch/Commit: a97c332

Reviewer: John Palmieri

Issue created by migration from https://trac.sagemath.org/ticket/20845

[vbraun]

Author: Volker Braun

[vbraun]

Upstream: Fixed upstream, but not in a stable release.

[vbraun]

Description changed:

--- 
+++ 
@@ -1 +1,3 @@
+This is because current_dir() checks for ENAMETOOLONG, but the actual errno is ERANGE.
 
+https://gitlab.com/embeddable-common-lisp/ecl/issues/258

[kiwifb]

comment:2

Taking care and checking in sage-on-gentoo first.

[vbraun]

comment:3

Our git server is down today, so you go first ;-)

[kiwifb]

comment:4

Success \o/

[jhpalmieri]

comment:5

I'm making this a blocker since I can't build the documentation with this problem

[kiwifb]

comment:6

And now you can review something.

---

New commits:

a97c332

Patch and version bump for track 20845.

[kiwifb]

Changed author from Volker Braun to François Bissey