[NFC][clang] Fix static analyzer concerns

ToolInvocation frees resources in the destructor but doesn't
have user-written copy c'tor or assignment operator, so copying it using
default ones can cause double free.

Reviewed By: aaron.ballman

Differential Revision: https://reviews.llvm.org/D156896

clang/include/clang/Tooling/Tooling.h

@@ -267,6 +267,9 @@ class ToolInvocation {
 
   ~ToolInvocation();
 
+  ToolInvocation(const ToolInvocation &) = delete;
+  ToolInvocation &operator=(const ToolInvocation &) = delete;
+
   /// Set a \c DiagnosticConsumer to use during driver command-line parsing and
   /// the action invocation itself.
   void setDiagnosticConsumer(DiagnosticConsumer *DiagConsumer) {