[llvm] [offload][nfc] Extract libomptarget infrastructure into libompaccsupport (PR #213784)

[Kevin Sala Penades via llvm-commits]

================
@@ -5,18 +5,20 @@ if(NOT TARGET "omp")
 endif()
 
 add_library(omptarget SHARED
-  device.cpp
   interface.cpp
   omptarget.cpp
-  OffloadRTL.cpp
   LegacyAPI.cpp
-  PluginManager.cpp
-  DeviceImage.cpp
 
   OpenMP/API.cpp
-  OpenMP/Mapping.cpp
   OpenMP/InteropAPI.cpp
-  OpenMP/OMPT/Callback.cpp
+
+  ../libompaccsupport/device.cpp
+  ../libompaccsupport/PluginManager.cpp
+  ../libompaccsupport/DeviceImage.cpp
+  ../libompaccsupport/OffloadRTL.cpp
+
+  ../libompaccsupport/Mapping.cpp
+  ../libompaccsupport/OMPT/Callback.cpp
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kevinsala wrote:

Sounds good.

https://github.com/llvm/llvm-project/pull/213784