Fix advance widths of portrait-sized icons

Fitting icons to a square canvas only helps normalise the sizes of icons
that're landscape in their dimensions (like Marko or Riot.js).

Affected icons:
- Augeas
- Babel
- Clean
- CLIPS
- Coq
- E
- Fancy
- Flow
- Frege
- Genshi
- Idris
- Jupyter
- Lean
- LFE
- LookML
- LSL
- Mako
- Mirah
- OWL
- Parrot
- PAWN
- Phalcon
- PogoScript
- POV-Ray
- Puppet
- SAS
- Scheme
- TCL
- Webpack