Expose the LiveInterval interfaces as public headers.

llvm-svn: 23400
diff --git a/llvm/lib/CodeGen/RegAllocLinearScan.cpp b/llvm/lib/CodeGen/RegAllocLinearScan.cpp
index 584316e..a42a366 100644
--- a/llvm/lib/CodeGen/RegAllocLinearScan.cpp
+++ b/llvm/lib/CodeGen/RegAllocLinearScan.cpp
@@ -12,7 +12,7 @@
 //===----------------------------------------------------------------------===//
 
 #define DEBUG_TYPE "regalloc"
-#include "LiveIntervalAnalysis.h"
+#include "llvm/CodeGen/LiveIntervalAnalysis.h"
 #include "PhysRegTracker.h"
 #include "VirtRegMap.h"
 #include "llvm/Function.h"