Mark dump() methods as const. NFC

Add const qualifier to any dump() method where adding one
was trivial.

Differential Revision: https://reviews.llvm.org/D34481

llvm-svn: 305963

llvm/lib/CodeGen/LiveDebugVariables.cpp

@@ -1006,7 +1006,7 @@ bool LiveDebugVariables::doInitialization(Module &M) {
 }
 
 #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
-LLVM_DUMP_METHOD void LiveDebugVariables::dump() {
+LLVM_DUMP_METHOD void LiveDebugVariables::dump() const {
   if (pImpl)
     static_cast<LDVImpl*>(pImpl)->print(dbgs());
 }