cpu_map: Ship arm_features.xml

The file was introduced in be03587a, but it was not added
to $(cpumap_DATA) at the time and so it didn't show up in the
distribution archive.
Signed-off-by: NAndrea Bolognani <abologna@redhat.com>

src/cpu_map/Makefile.inc.am

@@ -2,6 +2,7 @@
 
 cpumapdir = $(pkgdatadir)/cpu_map
 cpumap_DATA = \
+	cpu_map/arm_features.xml \
 	cpu_map/index.xml \
 	cpu_map/ppc64_vendors.xml \
 	cpu_map/ppc64_POWER7.xml \