efl_gfx_path: Support 'l' command for optimized path.

efl_gfx_path: Support 'l' command for optimized path.

Summary:
If there is no 'l' command for path optimization, refer to the previous cmd.
If the previous command is 'm', use 'l'.

Test Plan:
[Example SVG]
'''
<svg xmlns="http://www.w3.org/2000/svg" version="1.1" viewBox="0 0 40 40">
<g fill="none" fill-rule="evenodd">
<rect width="40" height="40" fill="#f00" opacity="0"/>
<path d="m12 20 13-12-13 12zm0 0 13 12-13-12z" fill-rule="nonzero" opacity=".12" stroke="#fff" stroke-linecap="round" stroke-linejoin="round" stroke-width="2"/>
</g>
</svg>
'''

Reviewers: Hermet, smohanty, kimcinoo

Reviewed By: Hermet

Subscribers: cedric, #reviewers, #committers

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D10074

Change-Id: I0e78949fcd0fdbff1d7a7314735319c2ce9924d4