fsobject.fsobject: Fix incorrect symlink formatting (#38271)

Thanks to looper for reporting.  Bug report was:

Symlink looses formatting

Details:

Steps to reproduce:
1. Make an empty directory end enter it.
2. Do :touch <some_filename>.
3. Open other tab with any path and copy any file with 'yy'.
4. Swap to previous tab and paste the symlink with 'pl'.
5. The symlink coloured and looks like common file, not like a symlink.
6. Move cursor to the symlink and back to <some_filename> from point 2. Now
the symlink looks as intended.
7. While cursos stays on <some_file>, reload cwd with 'R'. The symlink looks
like common file again.

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ranger-master 1.5.5

Python 2.7.3 (default, Jan  2 2013, 16:53:07)
[GCC 4.7.2]