Improve exception detail with JNI_OnLoad issues

Change-Id: I83c679d0b282f8d9ceb717acf20dda3af2124c66
diff --git a/src/native/java_lang_Runtime.cc b/src/native/java_lang_Runtime.cc
index 54ccddc..56a3a06 100644
--- a/src/native/java_lang_Runtime.cc
+++ b/src/native/java_lang_Runtime.cc
@@ -66,6 +66,8 @@
     return NULL;
   }
 
+  // Don't let a pending exception from JNI_OnLoad cause a CheckJNI issue with NewStringUTF.
+  env->ExceptionClear();
   return env->NewStringUTF(detail.c_str());
 }