crossdirect seems broken

Related:

• https://wiki.postmarketos.org/wiki/Build_internals
• !3486 (merged)

Describe your issue

What's the expected behaviour?

Building mutter for arm works with pmbootstrap's crossdirect setup.

What's the current behaviour?

from here:

Header "sys/random.h" has symbol "getrandom" : NO 
Header "linux/random.h" has symbol "getrandom" : NO 
meson.build:548:4: ERROR: Problem encountered: Required function getrandom not found
A full log can be found at /home/pmos/build/src/mutter-913655c03539fb03ff691dc5192acb03c7f0c011/output/meson-logs/meson-log.txt
>>> ERROR: mutter-mobile: build failed

Additional information

Apparently it works with crossdirect disabled, so adding !pmb:crossdirect as apkbuild option should work around it.

Seems to relate to a recent gcc upgrade.