package/qemu: add host-python3 as an explicit dependency

qemu requires python in its configre script. Yet host-python was
not listed as one of the package's dependencies. If no other package
requested host-python, then configuring this package will fail since
it won't find any executable named python in the host dir.

In order to reproduce this issue you must not have python2 installed
on your host machine.

Signed-off-by: Avi Shukron <avraham.shukron@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/qemu/qemu.mk

@@ -20,8 +20,7 @@ QEMU_LICENSE_FILES = COPYING COPYING.LIB
 
 #-------------------------------------------------------------
 # Target-qemu
-
-QEMU_DEPENDENCIES = host-pkgconf libglib2 zlib pixman
+QEMU_DEPENDENCIES = host-pkgconf libglib2 zlib pixman host-python3
 
 # Need the LIBS variable because librt and libm are
 # not automatically pulled. :-(
@@ -132,6 +131,7 @@ define QEMU_CONFIGURE_CMDS
 			--prefix=/usr \
 			--cross-prefix=$(TARGET_CROSS) \
 			--audio-drv-list= \
+			--python=$(HOST_DIR)/bin/python3 \
 			--enable-kvm \
 			--enable-attr \
 			--enable-vhost-net \
@@ -182,7 +182,7 @@ $(eval $(generic-package))
 #-------------------------------------------------------------
 # Host-qemu
 
-HOST_QEMU_DEPENDENCIES = host-pkgconf host-zlib host-libglib2 host-pixman
+HOST_QEMU_DEPENDENCIES = host-pkgconf host-zlib host-libglib2 host-pixman host-python3
 
 #       BR ARCH         qemu
 #       -------         ----
@@ -299,6 +299,7 @@ define HOST_QEMU_CONFIGURE_CMDS
 		--host-cc="$(HOSTCC)" \
 		--extra-cflags="$(HOST_CFLAGS)" \
 		--extra-ldflags="$(HOST_LDFLAGS)" \
+		--python=$(HOST_DIR)/bin/python3 \
 		$(HOST_QEMU_OPTS)
 endef