[config] changing config file extension
[config] changing config file extension

.scm is extension for Scheme, taking into account nothing prevents from
creating providers written on any language, it is better to have generic
.conf extension for configuration files because extension now defines
behaviour of dump/register

Signed-off-by: Denis Zalevskiy <43c40921ef02e9bb53daac07eb9ed16452640d88@jolla.com>

android-808/statefs,android-808/statefs,android-808/statefs,android-808/statefs