ProtoLog: Fix message about stale proto log configuration

Renders an easy to see error message with the instructions to proceed.

Test: add a new ProtoLog.e() invocation, then run make
Change-Id: Ie4f9caf686a63b4ad278f92fa32e99a5de0ed3b1
diff --git a/services/core/Android.bp b/services/core/Android.bp
index 80bc1af..6a3b38e 100644
--- a/services/core/Android.bp
+++ b/services/core/Android.bp
@@ -49,9 +49,11 @@
     ],
     cmd: "cp $(location :generate-protolog.json) $(out) && " +
       "{ diff $(out) $(location :services.core.protolog.json) >/dev/null 2>&1 || " +
-      "{ echo -e '##### ProtoLog viewer config is stale. ### \nRun: \n " +
-      "cp $(location :generate-protolog.json) " +
-      "$(location :services.core.protolog.json)\n' >&2 && false; } }",
+      "{ echo -e '\\n\\n################################################################\\n#\\n" +
+      "#  ERROR: ProtoLog viewer config is stale.  To update it, run:\\n#\\n" +
+      "#  cp $(location :generate-protolog.json) " +
+      "$(location :services.core.protolog.json)\\n#\\n" +
+      "################################################################\\n\\n' >&2 && false; } }",
     out: ["services.core.protolog.json"],
 }