bug#49485: [core-updates] Coreutils test failures on emulated ARMv7/AArch64

[Ludovic Courtès]

As can be seen in <https://ci.guix.gnu.org/build/657826/log/raw>, the
Coreutils test suite fails on emulated hardware because argv[0] is an
absolute file name whereas the test suite expects it to be a basename:

--8<---------------cut here---------------start------------->8---
@ build-started /gnu/store/hz81434lpq9fgsmngcad9abj72qfzqmy-coreutils-8.32.drv 
- aarch64-linux 
/var/log/guix/drvs/hz//81434lpq9fgsmngcad9abj72qfzqmy-coreutils-8.32.drv.bz2
108927

[...]

--- exp 2021-07-09 03:15:37.591279933 +0000
+++ err 2021-07-09 03:15:37.631279816 +0000
@@ -1,4 +1,4 @@
-tail: cannot fstat 'standard input'
-tail: error reading 'standard input'
-tail: no files remaining
-tail: -
+/tmp/guix-build-coreutils-8.32.drv-0/coreutils-8.32/./src/tail: cannot fstat 
'standard input'
+/tmp/guix-build-coreutils-8.32.drv-0/coreutils-8.32/./src/tail: error reading 
'standard input'
+/tmp/guix-build-coreutils-8.32.drv-0/coreutils-8.32/./src/tail: no files 
remaining
+/tmp/guix-build-coreutils-8.32.drv-0/coreutils-8.32/./src/tail: -
+ fail=1
+ tty -s
./tests/tail-2/follow-stdin.sh: line 72: /dev/tty: No such device or address
+ Exit 1
+ set +e
+ exit 1
+ exit 1
+ remove_tmp_
+ __st=1
+ cleanup_
+ kill 23630
+ test '' = yes
+ cd /tmp/guix-build-coreutils-8.32.drv-0/coreutils-8.32
+ chmod -R u+rwx 
/tmp/guix-build-coreutils-8.32.drv-0/coreutils-8.32/gt-follow-stdin.sh.5esc
+ rm -rf 
/tmp/guix-build-coreutils-8.32.drv-0/coreutils-8.32/gt-follow-stdin.sh.5esc
+ exit 1
FAIL tests/tail-2/follow-stdin.sh (exit status: 1)
--8<---------------cut here---------------end--------------->8---

To be continued…

Ludo’.