Fix syntax error in bazel_handler.go.

Test: go fmt no longer complains.
Change-Id: I725fb1d13f0f88a94e44b1fdbe9080590af2347a
diff --git a/android/bazel_handler.go b/android/bazel_handler.go
index 04b70d6..fbfc818 100644
--- a/android/bazel_handler.go
+++ b/android/bazel_handler.go
@@ -688,7 +688,7 @@
 	// Register bazel-owned build statements (obtained from the aquery invocation).
 	for index, buildStatement := range ctx.Config().BazelContext.BuildStatementsToRegister() {
 		if len(buildStatement.Command) < 1 {
-			panic(fmt.Sprintf("unhandled build statement: %s", buildStatement))
+			panic(fmt.Sprintf("unhandled build statement: %v", buildStatement))
 		}
 		rule := NewRuleBuilder(pctx, ctx)
 		cmd := rule.Command()