[llvm] [llvm-(min-)tblgen] Avoid redundant source compilation (PR #114494)

[NAKAMURA Takumi via llvm-commits]

================
@@ -79,6 +70,8 @@ add_tablegen(llvm-tblgen LLVM
   $<TARGET_OBJECTS:obj.LLVMTableGenBasic>
   $<TARGET_OBJECTS:obj.LLVMTableGenCommon>
 
+  PARTIAL_SOURCES_INTENDED
----------------
chapuni wrote:

It may be pruned.

https://github.com/llvm/llvm-project/pull/114494