openssl: fix bug #6770

openssl 1.0.1f Makefile.org doesn't quote $(CC) when passing the
parameter in another invocation of make, hence breaking when the
compiler string contains a space with multiple strings (for example with
ccache).

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>