Fix CLANG_BOOTSTRAP_TARGETS in Release.cmake

Take all `LLVM_RELEASE_FINAL_STAGE_TARGETS` elements and append them prefixed
with `stage2-` to `CLANG_BOOTSTRAP_TARGETS`.

Author: kwk

clang/cmake/caches/Release.cmake

@@ -55,15 +55,23 @@ set(STAGE1_RUNTIMES "compiler-rt")
 
 if (LLVM_RELEASE_ENABLE_PGO)
   list(APPEND STAGE1_PROJECTS "lld")
-  set(CLANG_BOOTSTRAP_TARGETS
+  set(tmp_targets
     generate-profdata
     stage2-package
     stage2-clang
+    stage2
     stage2-install
     stage2-check-all
     stage2-check-llvm
     stage2-check-clang CACHE STRING "")
 
+  foreach(X IN LISTS LLVM_RELEASE_FINAL_STAGE_TARGETS)
+    list(APPEND tmp_targets "stage2-${X}")
+  endforeach()
+  list(REMOVE_DUPLICATES tmp_targets)
+
+  set(CLANG_BOOTSTRAP_TARGETS "${tmp_targets}" CACHE STRING "")
+
   # Configuration for stage2-instrumented
   set(BOOTSTRAP_CLANG_ENABLE_BOOTSTRAP ON CACHE STRING "")
   # This enables the build targets for the final stage which is called stage2.