Add library path for intermediate rust in ldconfig

Build fails when using usual libdir. But since those are intermediate
builds, it is just easier to work around the issue by using ldconfig.
12 jobs for valentindavid/bootstrap-ppc64le in 2370 minutes and 25 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Bootstrap
passed #218221693
cache_x86_64 x86_64
bootstrap_powerpc64le

01:30:34

 
  Flatpak
passed #218221696
aarch64
app_aarch64

18:48:43

passed #218221697
armhf
app_arm

07:57:31

passed #218221695
cache_i686 x86_64
app_i686

06:35:07

passed #218221698
ppc64le
app_powerpc64le

18:53:28

passed #218221694
cache_x86_64 x86_64
app_x86_64

07:39:58

 
  Vm
manual #218221704
aarch64 allowed to fail manual
minimal_systemd_vm_aarch64
passed #219258020
armhf
minimal_systemd_vm_arm

00:04:23

passed #218221703
cache_i686 x86_64
minimal_systemd_vm_i686

00:13:11

failed #218221706
ppc64le allowed to fail
minimal_systemd_vm_powerpc64le

00:10:42

passed #218221700
cache_x86_64 x86_64
minimal_systemd_vm_x86_64

00:13:14

failed #218221705
armhf
minimal_systemd_vm_arm

00:08:26

 
Name Stage Failure
failed
minimal_systemd_vm_powerpc64le Vm
  File "/usr/lib64/python3.7/asyncio/base_events.py", line 584, in run_until_complete
return future.result()
File "utils/test-minimal-system", line 153, in run_test
assert prompt != None
AssertionError
Uploading artifacts...
/builds/freedesktop-sdk/freedesktop-sdk/cache/buildstream/logs: found 8736 matching files
Uploading artifacts to coordinator... ok id=218221706 responseStatus=201 Created token=7pyTmowS
ERROR: Job failed: exit code 1