libssh2 depends on openssl, therefore it is important that openssl is
build before libssh2.
The old get-deps would cause errors in 2 situations:
1) In a clean build, make of libssh2 would fail
2) In a normal build, where openssl changed version, make of libssh2 would
depend on old build.
Signed-off-by: Jan Iversen <jan@casacondor.com>