[HarfBuzz] harfbuzz: Changes to 'rand'

[Behdad Esfahbod]

New branch 'rand' available with the following commits:
commit de801b766783919b23e3b05c3d9fbe616bc7e103
Author: Behdad Esfahbod <behdad at behdad.org>
Date:   Mon Sep 10 22:37:19 2018 +0200

    Make --features rand=1 available to the user
    
    Use rand=255 to mean "randomize".
    
    Part of https://github.com/harfbuzz/harfbuzz/pull/803

commit 3e2daf59ca604688098e5247c3819f509360de60
Author: Behdad Esfahbod <behdad at behdad.org>
Date:   Mon Sep 10 16:36:05 2018 +0200

    Respect user's wish if they set rand feature manually
    
    Except if the set it to 1, which would mean "randomize"... Ugly.

commit 99b87f99a576a1188b2bcefd97e1aea49bf7a11d
Author: Behdad Esfahbod <behdad at behdad.org>
Date:   Mon Sep 10 16:24:52 2018 +0200

    Minor clean up of 'rand' patchset

commit 93a26b13514cde5ddf7699b149397b2714b57ec0
Author: David Corbett <corbett.dav at husky.neu.edu>
Date:   Fri Feb 23 12:22:32 2018 -0500

    Don't seed the RNG from the contents of the buffer

commit 2a51944839c8278e183e52d558b566f266c8712d
Author: David Corbett <corbett.dav at husky.neu.edu>
Date:   Sat Jan 27 19:48:38 2018 -0500

    Test 'rand'

commit 811eb861b081cd62d59150738396698ffea7ded2
Author: David Corbett <corbett.dav at husky.neu.edu>
Date:   Fri Jan 26 21:36:15 2018 -0500

    Allow requesting a specific glyph for 'rand'
    
    Randomization only happens by default. If the user specifies a value for
    'rand', that value is respected.

commit fc2509c11a09420213c4882fec16da43b9908af9
Author: David Corbett <corbett.dav at husky.neu.edu>
Date:   Thu Jan 25 14:22:03 2018 -0500

    Implement 'rand'