fix syscall numbers for arm

[jepio]

The previous numbers were not correct at all, and resulted in SIGILL being
raised when called on ARM. I took the updated values from:
https://chromium.googlesource.com/chromiumos/docs/+/master/constants/syscalls.md

[jepio]

@JohnRusk @jiacfan don't know if you still look at this repo but it would be nice if you could merge and tag a release, that way I could bump the dependency in azcopy and make it work on ARMv7.

[JohnRusk]

@jepio, I'm not involved in this repro anymore, but @jiacfan or @zezha-msft may be able to help.

[jepio]

Thanks. For completeness I found out what was wrong: the original numbers refer to OABI, but everything out there uses EABI.

[mohsha-msft]

Hey @jepio ,

We've forked this repo here
I've picked your changes and merged them here

[mohsha-msft]

Please let me know if there is any other dependency you wish to merge in order to make ARM work.

[jepio]

Hi @mohsha-msft,
Thanks, this is the only dependency that needed changing for ARM support. Since you're going to use the fork, I'm closing this PR then.