[Orc] Rename JITCompileCallbackManagerBase to JITCompileCallbackManager.

This class is turning into a useful interface, rather than an implementation
detail, so I'm dropping the 'Base' suffix.

No functional change.

llvm-svn: 254693
diff --git a/llvm/unittests/ExecutionEngine/Orc/CompileOnDemandLayerTest.cpp b/llvm/unittests/ExecutionEngine/Orc/CompileOnDemandLayerTest.cpp
index 49f4cc1..4a30cfc 100644
--- a/llvm/unittests/ExecutionEngine/Orc/CompileOnDemandLayerTest.cpp
+++ b/llvm/unittests/ExecutionEngine/Orc/CompileOnDemandLayerTest.cpp
@@ -16,10 +16,10 @@
 
 namespace {
 
-class DummyCallbackManager : public orc::JITCompileCallbackManagerBase {
+class DummyCallbackManager : public orc::JITCompileCallbackManager {
 public:
   DummyCallbackManager()
-      : JITCompileCallbackManagerBase(0), NextStubAddress(0),
+      : JITCompileCallbackManager(0), NextStubAddress(0),
         UniversalCompile([]() { return 0; }) {
   }