libcrypto: configure "no-dso" for static builds

Right now we configure with DSO even when building a static version of the
library, which introduces a dependency on libdl.  We don't statically build
libdl, so libcrypto_static needs NO_DSO in order to be used in static
executables.

Change-Id: Ic27900f19600c1d882c1ed5aca483b15190b1e02