fix no openssl libversion
We need to install openssl libraries because the blank LIBVERSION
variable is not reliable to get rid of the major and minor versions
in the soname of libssl and libcrypto. To make this consistent on all
platforms it's choosen to add the version info in the soname. It should
work on Android (libraries installed in the apk) and Kindle
(libssl.so.1.0.0 is in /usr/lib). If it fails on Kobo (as it always
would be) we probably need to ship with openssl libraries for all platform.
Merge pull request #279 from koreader/chrox-master

fix no openssl libversion