Error message fix.

Author: Miloslav Metelka

com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/RInternalError.java

@@ -205,6 +205,8 @@ private static void reportError(String errMsg, Throwable throwable, int contextI
                         } catch (IOException e) {
                             e.printStackTrace();
                         }
+                    } else {
+                        message += ". Cannot write error log file (tried current working directory, user home directory, FastR home directory).";
                     }
                     System.err.println(message);
                     if (RContext.isEmbedded()) {

com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/ffi/RFFILog.java

@@ -99,7 +99,7 @@ private static void initTraceStream() {
                 System.exit(1);
             }
         } else {
-            System.err.println("Cannot produce trace log file at any of the standard locations. Please check directory permissions.");
+            System.err.println("Cannot write trace log file (tried current working directory, user home directory, FastR home directory).");
             System.exit(1);
         }
     }