Spell `necessary' correctly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7944 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/FileParser.y b/utils/TableGen/FileParser.y
index 9650c53..728fcf2 100644
--- a/utils/TableGen/FileParser.y
+++ b/utils/TableGen/FileParser.y
@@ -130,7 +130,7 @@
     abort();
   } else {    // This class expects template arguments...
     // Loop over all of the template arguments, setting them to the specified
-    // value or leaving them as the default as neccesary.
+    // value or leaving them as the default as necessary.
     for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
       if (i < TemplateArgs.size()) {  // A value is specified for this temp-arg?
 	// Set it now.