Adjust comment to say that assertions are off by default.

llvm-svn: 114337
diff --git a/llvm/configure b/llvm/configure
index d2b98bf..4a9ef33 100755
--- a/llvm/configure
+++ b/llvm/configure
@@ -1394,7 +1394,7 @@
   --enable-optimized      Compile with optimizations enabled (default is NO)
   --enable-profiling      Compile with profiling enabled (default is NO)
   --enable-assertions     Compile with assertion checks enabled (default is
-                          YES)
+                          NO)
   --enable-expensive-checks
                           Compile with expensive debug checks enabled (default
                           is NO)