Add a note about LSF with version 7.0.5.

This commit was SVN r21179.

README

@@ -660,6 +660,13 @@ for a full list); a summary of the more commonly used ones follows:
   LSF is a resource manager system, frequently used as a batch
   scheduler in HPC systems.
 
+  NOTE: If you are using LSF version 7.0.5, you will need to add
+        "LIBS=-ldl" to the configure command line.  For example:
+
+            ./configure LIBS=-ldl --with-lsf ...
+
+        This workaround should *only* be needed for LSF 7.0.5.
+
 --with-lsf-libdir=<directory>
   Look in directory for the LSF libraries.  By default, Open MPI will
   look in <lsf directory>/lib and <lsf directory>/lib64, which covers