MFH: r425303 r425309

Fix modes for /compat/linux/proc

When linprocfs is mounted the mode set to /compat/linux/proc is set to 555
while the package said 755 meaning pkg will try to change it 755 and fail
preventing upgrade or installation of the package because linprocfs does not
support changing attributes.

Enforce it to 555 to prevent that situation

Apply r425303 to linux_base-f10: Fix modes for /compat/linux/proc