cpu: Fix build constraints.

siavashs · siavashs · commit f8ede8248820 · 2015-07-14T13:58:53.000+04:30
diff --git a/collector/cpu_freebsd.go b/collector/cpu_freebsd.go
@@ -1,4 +1,4 @@
-// +build !cpu
+// +build !nocpu
 
 package collector
 
