[examples][ORC] Fix program names in calls to parse cl opt in examples.

These examples were all copied and adapted from the original HowToUseLLJIT
example code, however the calls to cl::ParseCommandLineOptions were not
updated.

llvm/examples/LLJITExamples/LLJITDumpObjects/LLJITDumpObjects.cpp

@@ -39,7 +39,7 @@ int main(int argc, char *argv[]) {
   InitializeNativeTarget();
   InitializeNativeTargetAsmPrinter();
 
-  cl::ParseCommandLineOptions(argc, argv, "HowToUseLLJIT");
+  cl::ParseCommandLineOptions(argc, argv, "LLJITDumpObjects");
   ExitOnErr.setBanner(std::string(argv[0]) + ": ");
 
   outs()

llvm/examples/LLJITExamples/LLJITWithCustomObjectLinkingLayer/LLJITWithCustomObjectLinkingLayer.cpp

@@ -33,7 +33,7 @@ int main(int argc, char *argv[]) {
   InitializeNativeTarget();
   InitializeNativeTargetAsmPrinter();
 
-  cl::ParseCommandLineOptions(argc, argv, "HowToUseLLJIT");
+  cl::ParseCommandLineOptions(argc, argv, "LLJITWithCustomObjectLinkingLayer");
   ExitOnErr.setBanner(std::string(argv[0]) + ": ");
 
   // Detect the host and set code model to small.

llvm/examples/LLJITExamples/LLJITWithObjectCache/LLJITWithObjectCache.cpp

@@ -83,7 +83,7 @@ int main(int argc, char *argv[]) {
   InitializeNativeTarget();
   InitializeNativeTargetAsmPrinter();
 
-  cl::ParseCommandLineOptions(argc, argv, "HowToUseLLJIT");
+  cl::ParseCommandLineOptions(argc, argv, "LLJITWithObjectCache");
   ExitOnErr.setBanner(std::string(argv[0]) + ": ");
 
   MyObjectCache MyCache;