Make status line bold

Bolding the status line provides differentiation between output
of each command.

Test: status_test.go
Change-Id: I9d46761e69c5af0a0aa86c7921e121cfd2a3fc82
diff --git a/ui/terminal/smart_status.go b/ui/terminal/smart_status.go
index 9a4931c..8fa9eff 100644
--- a/ui/terminal/smart_status.go
+++ b/ui/terminal/smart_status.go
@@ -149,8 +149,10 @@
 		}
 	}
 
-	// Move to the beginning on the line, print the output, then clear
-	// the rest of the line.
-	fmt.Fprint(s.writer, "\r", str, "\x1b[K")
+	// Move to the beginning on the line, turn on bold, print the output,
+	// turn off bold, then clear the rest of the line.
+	start := "\r\x1b[1m"
+	end := "\x1b[0m\x1b[K"
+	fmt.Fprint(s.writer, start, str, end)
 	s.haveBlankLine = false
 }