Log LLVM error messages in libbcc.

Change-Id: I97f1e73f28c326c5df8a3cfca2bb50692ce32999
diff --git a/lib/ExecutionEngine/Script.cpp b/lib/ExecutionEngine/Script.cpp
index 8ee60c9..cc9801a 100644
--- a/lib/ExecutionEngine/Script.cpp
+++ b/lib/ExecutionEngine/Script.cpp
@@ -178,7 +178,11 @@
   }
 #endif
 
-  return internalCompile();
+  int status = internalCompile();
+  if (status != 0) {
+    LOGE("LLVM error message: %s\n", getCompilerErrorMessage());
+  }
+  return status;
 }