examples/vhost_scsi: fix header check for meson build
examples/vhost_scsi: fix header check for meson build

The header check for the example app was looking for virtio_scsi.h without
the "linux/" prefix, which meant it was never getting found when it should
have been.

Fixes: 8d47a753b7cb ("examples/vhost_scsi: disable build if missing dependency")
Cc: stable@dpdk.org

Signed-off-by: Bruce Richardson <66b9e8e8fbd5e9f41f91b0af050876182ce9d0e4@intel.com>
Reviewed-by: Tiwei Bie <f338cf29d7d69ff1bc99f755ebfb0eb0accd409e@intel.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk