[Virtio-fs] Rebased kernel patches to 5.3-rc kernel

[Vivek Goyal]

Hi All,

I have rebased virtio_fs kernel patches to 5.3-rc kernel and pushed it to my
github repo.

https://github.com/rhvgoyal/linux/commits/vivek-5.3-aug-07-2019

This compiles and passes basic tests. It needs more testing though.

It needs one patch in virtiofsd to change bit position of MAP_ALIGNMENT
flag. I posted a patch for that.

Give it a try and let us know if you face issues.

Thanks
Vivek