Summary:
Remove unnecessary point movement in rgb(255, 255, 255) case in svg parsing.
In svg parsing, move the pointer by 'rgb(' before calling
_color_parser() in the rgb(255, 255, 255) case.
In function, string pointer moved unnecessary, so parsing is incorrect.
Therefore, remove unnecessary point movement.
Test Plan:
svg sample code
```
<svg xmlns:svg="http://www.w3.org/2000/svg" viewBox="0 0 300 300">
<path d="M 0 0 h 200 v 200 z" style="fill:rgb(255, 155, 55);"/>
</svg>
```
before
{F4504779}
after
{F4504778}
Reviewers: Hermet
Subscribers: cedric, #reviewers, #committers
Tags: #efl
Differential Revision: https://phab.enlightenment.org/D12284