The glyphs for %phi and %varphi symbols were swapped in commit
81001f2c (back in 2009), as part of
https://bz.apache.org/ooo/show_bug.cgi?id=105084 (see the document
attached there), but no justification was given.

Given the shape of the symbols after that change contradicts the ones in
the Unicode code charts and other popular math fonts, I simply swapped
them back.

Change-Id: I0133a3d07df932f144ec5900103e11e27f174a5e
Reviewed-on: https://gerrit.libreoffice.org/17822Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>