Fixing INCLUDE_DIRS handling in hpvm-clang to include hpvm/include by default

hpvm/tools/hpvm-clang/CMakeLists.txt

@@ -29,6 +29,9 @@ if(TARGET tensor_runtime)
 else()
   set(HPVM_HAS_TRT 0)  # Doesn't have tensor runtime
 endif()
+
+list(APPEND INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR}/../../include)
+
 if(${HPVM_USE_OPENCL})
   # We need to link to OpenCL libs when hpvm uses opencl
   # because OpenCL functions may be injected by the OpenCL pass.