Fix expected error message for wrong_arch

Bug: https://issuetracker.google.com/38429013
Test: cts-tradefed run singleCommand cts --skip-preconditions -m CtsJniTestCases
Change-Id: Ib807c4fe9f6d3b186e4ad99c46f6fd1daa369d3b
(cherry picked from commit afe3b630df3255b59d52f0a1d8be6a91f1f7a489)
diff --git a/tests/tests/jni/libjnitest/android_jni_cts_LinkerNamespacesTest.cpp b/tests/tests/jni/libjnitest/android_jni_cts_LinkerNamespacesTest.cpp
index ec81980..7ff00b0 100644
--- a/tests/tests/jni/libjnitest/android_jni_cts_LinkerNamespacesTest.cpp
+++ b/tests/tests/jni/libjnitest/android_jni_cts_LinkerNamespacesTest.cpp
@@ -88,7 +88,7 @@
   // https://issuetracker.google.com/37428428
   // It's okay to not be able to load a library because it's for another
   // architecture (typically on an x86 device, when we come across an arm library).
-  return err.find("dlopen failed: library \"" + library + "\" has unexpected e_machine: ") == 0;
+  return err.find("dlopen failed: \"" + library + "\" has unexpected e_machine: ") == 0;
 }
 
 static bool check_lib(const std::string& path,