package/mpv: add staging install

MPV is not only an application, but also a library, which should be avaliable in staging.

Signed-off-by: Zeno Endemann <zeno.endemann@mailbox.org>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/mpv/mpv.mk

@@ -12,6 +12,7 @@ MPV_DEPENDENCIES = \
 MPV_LICENSE = GPL-2.0+
 MPV_LICENSE_FILES = LICENSE.GPL
 MPV_CPE_ID_VENDOR = mpv
+MPV_INSTALL_STAGING = YES
 
 MPV_NEEDS_EXTERNAL_WAF = YES