[clang][arcmt] NFCI: Change invocation const-ness

Author: jansvoboda11

clang/include/clang/ARCMigrate/ARCMT.h

@@ -102,7 +102,7 @@ class MigrationProcess {
 public:
   bool HadARCErrors;
 
-  MigrationProcess(const CompilerInvocation &CI,
+  MigrationProcess(CompilerInvocation &CI,
                    std::shared_ptr<PCHContainerOperations> PCHContainerOps,
                    DiagnosticConsumer *diagClient,
                    StringRef outputDir = StringRef());

clang/lib/ARCMigrate/ARCMT.cpp

@@ -505,7 +505,7 @@ class RewritesApplicator : public TransformActions::RewriteReceiver {
 MigrationProcess::RewriteListener::~RewriteListener() { }
 
 MigrationProcess::MigrationProcess(
-    const CompilerInvocation &CI,
+    CompilerInvocation &CI,
     std::shared_ptr<PCHContainerOperations> PCHContainerOps,
     DiagnosticConsumer *diagClient, StringRef outputDir)
     : OrigCI(CI), PCHContainerOps(std::move(PCHContainerOps)),