mips: enable sloppyXcheck for mips32 and mips64

mips: enable sloppyXcheck for mips32 and mips64

Newer mips kernels (post 4.7.0) assign execute permissions to loadable
program segments which originally did not have them as per the
information provided in the elf file itself.

Include mips32/mips64 in the list of architectures for which the address
space manager should allow the kernel to report execute permissions in
sync_check_mapping_callback.

Patch by Stefan Maksimovic.