README: set minimal required Git version to 1.8.5
README: set minimal required Git version to 1.8.5

Git 1.8.2 seems to be sufficent for Linux but not for macOS. 

Related change: 632f4881293d6974f169adce3a0f53b4e96393bb
bozaro/git-lfs,dakotahawkins/git-lfs,andyneff/git-lfs,bozaro/git-lfs,github/git-lfs,aleb/git-lfs,github/git-lfs,andyneff/git-lfs,andyneff/git-lfs,dakotahawkins/git-lfs,Jericho25/-git-lfs_miilkyway,dakotahawkins/git-lfs,bozaro/git-lfs,aleb/git-lfs,Jericho25/-git-lfs_miilkyway,github/git-lfs,aleb/git-lfs,Jericho25/-git-lfs_miilkyway