Squashed 'waflib/' changes from 982416b..3e43d09
Squashed 'waflib/' changes from 982416b..3e43d09

3e43d09 Add short forms for common options
5db477c Automatically define version for child libraries

git-subtree-dir: waflib
git-subtree-split: 3e43d0965e29bbd7bf8aa1281930ffa75f401c99

drobilla/serd,drobilla/serd