Log Message:
Use a compile test at configure to check for SSE, not just the existence
of a header.
Default compiler setup in netbsd disables SSE, we cannot compile stuff
that uses it - but we do have the headers for it.

Allows us to get rid of SSE disabling for sunpro compiler, it should
fail the compile test as well.

Patch from FreeBSD (pointed out by John D. Baker)

Fixes PR pkg/51209: audio/lame build fails on i386-7.99.30