qemu: install firmware files to /usr/lib to please the pkglint-elf-in-usrshare hook

[skip ci]

srcpkgs/qemu/template

@@ -1,7 +1,7 @@
 # Template file for 'qemu'
 pkgname=qemu
 version=3.1.0
-revision=1
+revision=2
 short_desc="Open Source Processor Emulator"
 maintainer="Juan RP <xtraeme@voidlinux.org>"
 license="GPL-2.0-or-later, LGPL-2.1-or-later"
@@ -63,7 +63,7 @@ do_configure() {
 		--disable-xen --enable-tpm \
 		--enable-vhost-net --enable-vnc-png --enable-virtfs \
 		--enable-libusb --disable-glusterfs --enable-snappy --enable-usb-redir \
-		--enable-pie --localstatedir=/var \
+		--enable-pie --localstatedir=/var --datadir=/usr/lib \
 		$(vopt_enable virgl virglrenderer) $(vopt_enable opengl) $(vopt_enable spice) \
 		${want_sdl} \
 		$(vopt_if sdl "--with-sdlabi=1.2") \