Revert "Introduce SymbolResolver and its subclasses."

This reverts commit ee69009f3590748aac4db17c0f9774252326d6cb.
diff --git a/lib/ExecutionEngine/Android.mk b/lib/ExecutionEngine/Android.mk
index c3566e5..ae6352c 100644
--- a/lib/ExecutionEngine/Android.mk
+++ b/lib/ExecutionEngine/Android.mk
@@ -25,7 +25,6 @@
 libbcc_executionengine_SRC_FILES := \
   BCCContext.cpp \
   BCCContextImpl.cpp \
-  BCCRuntimeSymbolResolver.cpp \
   Compiler.cpp \
   FileBase.cpp \
   GDBJIT.cpp \
@@ -35,14 +34,13 @@
   MCCacheReader.cpp \
   OutputFile.cpp \
   RSScript.cpp \
-  BCCRuntimeStub.c \
+  Runtime.c \
+  RuntimeStub.c \
   Script.cpp \
   ScriptCached.cpp \
   ScriptCompiled.cpp \
   Sha1Helper.cpp \
-  Source.cpp \
-  SymbolResolverProxy.cpp \
-  SymbolResolvers.cpp
+  Source.cpp
 
 
 #=====================================================================