drop mounting ld.so.cache on non-glibc systems

This file is only needed on glibc-based systems.
Alternative implementations of standard C libraries do not need it and always ignored.
Lock /etc/ld.co.cache to glibc-based system only.

Signed-off-by: Ishimoto Shinobu <nagakamira@gmail.com>
1 job for musl-fix in 3 minutes and 16 seconds (queued for 1 second)
Status Name Job ID Coverage
  Test
failed build_stable #1226755

00:03:16

 
Name Stage Failure
failed
build_stable Test
[30/43] Compiling C object libgnome-desktop/libgnome-desktop-3.so.19.1.3.p/gnome-rr.c.o
ninja: build stopped: subcommand failed.
Uploading artifacts for failed job
Uploading artifacts...
build/meson-logs/: found 2 matching files and directories

WARNING: build/test-results/: no matching files
Uploading artifacts as "archive" to coordinator... ok
id=1226755 responseStatus=201 Created token=W-5vmtJh
Cleaning up file based variables
ERROR: Job failed: exit code 1