Update build.vars and build-complete.vars to match 2.3.4-I604

This change updates OpenSSL to 1.0.1j. It also turns on --static-libgcc on in
OpenSSL builds by default, because without it 32-bit versions of openvpn.exe
will fail to launch due to missing DLL files.

Signed-off-by: samuli <samuli@openvpn-build.openvpn.in>