fix a bunch of comment typos found by codespell.  Patch by
Luis Felipe Strano Moraes!

llvm-svn: 129559
diff --git a/clang/lib/Lex/LiteralSupport.cpp b/clang/lib/Lex/LiteralSupport.cpp
index 16d7b36..37e7bf4 100644
--- a/clang/lib/Lex/LiteralSupport.cpp
+++ b/clang/lib/Lex/LiteralSupport.cpp
@@ -710,7 +710,7 @@
   ++begin;
 
   // FIXME: The "Value" is an uint64_t so we can handle char literals of
-  // upto 64-bits.
+  // up to 64-bits.
   // FIXME: This extensively assumes that 'char' is 8-bits.
   assert(PP.getTargetInfo().getCharWidth() == 8 &&
          "Assumes char is 8 bits");