[llvm] Add missing header guards in LogicCombine.h and LogicalExpr.h

These files were added in 97dcbea but
it looks like they are missing header guards. This breaks module builds.

Author: bulbazord

llvm/include/llvm/Analysis/LogicCombine.h

@@ -6,6 +6,9 @@
 //
 //===----------------------------------------------------------------------===//
 
+#ifndef LLVM_ANALYSIS_LOGICCOMBINE_H
+#define LLVM_ANALYSIS_LOGICCOMBINE_H
+
 #include "LogicalExpr.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/SetVector.h"
@@ -66,3 +69,5 @@ inline raw_ostream &operator<<(raw_ostream &OS, const LogicalOpNode &I) {
 }
 
 } // namespace llvm
+
+#endif // LLVM_ANALYSIS_LOGICCOMBINE_H

llvm/include/llvm/Analysis/LogicalExpr.h

@@ -44,6 +44,9 @@
 ///      c
 //===----------------------------------------------------------------------===//
 
+#ifndef LLVM_ANALYSIS_LOGICALEXPR_H
+#define LLVM_ANALYSIS_LOGICALEXPR_H
+
 #include "llvm/ADT/DenseSet.h"
 
 namespace llvm {
@@ -138,3 +141,5 @@ inline LogicalExpr operator~(const LogicalExpr &a) {
 }
 
 } // namespace llvm
+
+#endif // LLVM_ANALYSIS_LOGICALEXPR_H