build: add -DMINIUPNP_STATICLIB for new version

libminiupnpc changed their required static define to the much more sane
"MINIUPNP_STATICLIB". Sadly, they don't respect the old "STATICLIB" for
back-compat. Define them both since the old one didn't seem to be conflicting
anywhere.

Also go ahead and split out the cppflags so that they can be applied only where
they're needed. This will help us to build dll's from our libs without having
their import/export declspecs poisoned.
depends: bump openssl to 1.0.1i

This is the forward-port of bba01750226745d6666d587cabe57c321fde0875.
depends: bump miniupnpc to 1.9.20140701.

This is the forward-port of a9c6eef915ee264ccf4169d5e8769a6be1fa101a
Merge pull request #4767

b144a74 depends: bump miniupnpc to 1.9.20140701. (Cory Fields)
f628127 depends: bump openssl to 1.0.1i (Cory Fields)
9f7f504 build: add -DMINIUPNP_STATICLIB for new version (Cory Fields)