meson: Check the nasm version with run_command
meson: Check the nasm version with run_command

Fixes https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/issues/751

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/631>

GStreamer/gst-plugins-good,GStreamer/gst-plugins-good,pexip/gst-plugins-good,pexip/gst-plugins-good,GStreamer/gst-plugins-good,pexip/gst-plugins-good,pexip/gst-plugins-good,pexip/gst-plugins-good,GStreamer/gst-plugins-good