Add docs for new column, native tests now run with -O2

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7935 91177308-0d34-0410-b5e6-96231b3b80d8

utils/NightlyTestTemplate.html

@@ -135,14 +135,16 @@ <h2>Changes in the test suite:</h2>
 <li><a name="Machine<br>code">Machine code</a> - The number of bytes of machine
     code generated by the JIT.</li>
 <li><a name="GCC">GCC</a> - The time taken to execute the program when compiled
-    with GCC -O3.</li>
+    with GCC -O2.</li>
 <li><a name="CBE">CBE</a> - The time taken to execute the program after
     compilation through the C Backend.</li>
 <li><a name="LLC">LLC</a> - How long does the program generated by the static
     backend LLC take to execute </li>
 <li><a name="JIT">JIT</a> - The amount of time spent running the
     program with the JIT; this includes the code generation phase (listed above)
     and actually running the program.</li>
+<li><a name="GCC/LLC">GCC/LLC - The speed-up of the LLC output vs the native 
+    GCC output: greater than 1 is a speedup, less than 1 is a slowdown.
 </ol><p>
 
 A complete log of testing <a href="$DATE-ProgramTest.txt.gz">is available</a>