add -C for cpu

src/cmd/draw/stats.c

diff --git a/src/cmd/draw/stats.c b/src/cmd/draw/stats.c
index 8a43fb0..0d249a8 100644
--- a/src/cmd/draw/stats.c
+++ b/src/cmd/draw/stats.c
@@ -746,6 +746,9 @@
 	case 'c':
 		addgraph(Vcontext);
 		break;
+	case 'C':
+		addgraph(Vcpu);
+		break;
 	case 'e':
 		addgraph(Vether);
 		break;