Two patches need to be made to the criu source tree 

1. <criu src tree roott>/criu/arch/arm/bitops.S

patch bitops.S bitops-armv6-patch-25-08-2021

reason: ARM6 ISA does not support out of order instructions (bitops.S contains
armvv7 instruction dmm ish). This needs to be #ifdef'd out if archictecture is
arm6k


2. <criu src tree root>/criu/arch/arm/include/asm/restorer.h

patch restorer.h restorer-armv6-patch-mao-25-08-2021

Arm6 ISA does not support long literals (but restorer.h for armv6k
contains armv7 instructions)

