Fix format string issues

Fix issues caught by go vet.

Test: m checkbuild
Change-Id: Ib8d740457c15432dabe1575a6707726ddaf93084
diff --git a/cmd/pom2mk/pom2mk.go b/cmd/pom2mk/pom2mk.go
index bf47896..4fc484c 100644
--- a/cmd/pom2mk/pom2mk.go
+++ b/cmd/pom2mk/pom2mk.go
@@ -305,7 +305,7 @@
 	dir := flag.Arg(0)
 	absDir, err := filepath.Abs(dir)
 	if err != nil {
-		fmt.Println(os.Stderr, "Failed to get absolute directory:", err)
+		fmt.Fprintln(os.Stderr, "Failed to get absolute directory:", err)
 		os.Exit(1)
 	}