phoneui-shr-theme: rename config file in do_install

* see http://lists.linuxtogo.org/pipermail/openembedded-core/2013-March/037025.html
* renaming by update-alternatives.bbclass happens too late in do_package, fixes warnings like:
  WARNING: The recipe phoneui-shr-theme-neo is trying to install files into a shared area when those files already exist. Those files and their manifest location are:
   /home/jenkins/oe/shr-core-branches/shr-core/tmp-eglibc/sysroots/qemuarm/usr/share/libphone-ui-shr/config
   Matched in manifest-qemuarm-phoneui-shr-theme-o2
  manifest-qemuarm-phoneui-shr-theme-sowka
  Please verify which package should provide the above files.

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>