package/meson: fix cross-compilation.conf.in formatting

Add missing space for the cross-compilation.conf.in cpu_family
entry.

Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/meson/cross-compilation.conf.in

@@ -24,6 +24,6 @@ pkg_config_static = '@STATIC@'
 
 [host_machine]
 system = 'linux'
-cpu_family ='@TARGET_ARCH@'
+cpu_family = '@TARGET_ARCH@'
 cpu = '@TARGET_CPU@'
 endian = '@TARGET_ENDIAN@'