xuname: avoid "cat abuse" and run awk directly on /proc/cpuinfo

xuname

@@ -8,8 +8,8 @@ OUTDATED=$(xbps-install -Mun)
 HOLD=$(xbps-query -H)
 VM=$(dmesg 2>/dev/null | awk '/Hypervisor detected/{print $NF}')
 [ -z "$VM" ] && grep -q hypervisor /proc/cpuinfo && VM=VM
-CPU=$(cat /proc/cpuinfo |awk '/^vendor_id/{print $NF;exit}')
-[ -z "$CPU" ] && CPU=$(cat /proc/cpuinfo |awk '/^platform/{print $NF;exit}')
+CPU=$(awk '/^vendor_id/{print $NF;exit}' /proc/cpuinfo)
+[ -z "$CPU" ] && CPU=$(awk '/^platform/{print $NF;exit}' /proc/cpuinfo)
 REPO=$(xbps-query --regex -p repository -s '.' | cut -d/ -f2- | sort -u | awk '
 	/^\/repo-default.voidlinux.org\/current\/multilib/ {m=m"m"}
 	/^\/repo-default.voidlinux.org\/current\/debug/ {d=d"d"}