Document nonlazybind.

llvm-svn: 133160

llvm/docs/LangRef.html

@@ -1164,6 +1164,11 @@ define void @f() optsize { ... }
       Most of the functions in the Windows system DLLs in Windows XP SP2 or
       higher were compiled in this fashion.</dd>
 
+  <dt><tt><b>nonlazybind</b></tt></dt>
+  <dd>This attribute suppresses lazy symbol binding for the function. This
+      may make calls to the function faster, at the cost of extra program
+      startup time if the function is not called during program startup.</dd>
+
   <dt><tt><b>inlinehint</b></tt></dt>
   <dd>This attribute indicates that the source code contained a hint that inlining
       this function is desirable (such as the "inline" keyword in C/C++).  It