Michael Drake ebfcc6d9a9 Add script for setting files to git last touched date.
This may help with whatever issue is causing a problem with RISC OS
!Boot and !System distributions.

From the base of the netsurf repo, you can run it like this:

  $ ./utils/git-date.sh riscos/distribution/
2016-02-19 15:25:06 +00:00
..
2016-01-08 17:16:42 +00:00
2016-01-08 17:16:42 +00:00
2014-08-04 00:37:21 +01:00
2011-07-08 08:38:17 +00:00
2015-10-12 21:08:25 +01:00