Tidy up. s/Low Level Virtual Machine/LLVM/.

LLVM isn't an acronym anymore.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148985 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/doxygen.intro b/docs/doxygen.intro
index 547730c..699dadc 100644
--- a/docs/doxygen.intro
+++ b/docs/doxygen.intro
@@ -1,7 +1,7 @@
-/// @mainpage Low Level Virtual Machine
+/// @mainpage LLVM
 ///
 /// @section main_intro Introduction
-/// Welcome to the Low Level Virtual Machine (LLVM).
+/// Welcome to LLVM.
 ///
 /// This documentation describes the @b internal software that makes 
 /// up LLVM, not the @b external use of  LLVM. There are no instructions