Add libssl to bindep
Source builds using cryptography need libssl-dev (and assorted other
platform package names) to compile. Adding package declaration for
dpkg, rpm, and suse.
Closes-bug:
@@ -10,3 +10,6 @@ libxml2-devel [platform:rpm]
libxml2-dev [platform:dpkg]
libxslt-devel [platform:rpm]
libxslt1-dev [platform:dpkg]
+libssl-dev [platform:dpkg]
+openssl-devel [platform:rpm !platform:suse]
+libopenssl-devel [platform:suse !platform:rpm]
