Allow getrlimit/ugetrlimit syscalls in tests.

The fdsan code uses getrlimit/ugetrlimit so need to allow that when
running the debuggerd unit tests.

Bug: 141045754

Test: Ran the offending tests hundreds of times without failure.
Change-Id: Iece94f03e7895d61ca8a8f3ab17dce7e54ddf9cd
diff --git a/debuggerd/debuggerd_test.cpp b/debuggerd/debuggerd_test.cpp
index fbc8b97..c86a018 100644
--- a/debuggerd/debuggerd_test.cpp
+++ b/debuggerd/debuggerd_test.cpp
@@ -603,6 +603,8 @@
   policy += "\nclone: 1";
   policy += "\nsigaltstack: 1";
   policy += "\nnanosleep: 1";
+  policy += "\ngetrlimit: 1";
+  policy += "\nugetrlimit: 1";
 
   FILE* tmp_file = tmpfile();
   if (!tmp_file) {