[CMake] Adding llvm-profdata to the list of tools clang needs.

Bootstrapping clang to generate PGO data (patches coming soon), requires llvm-profdata targets to be generated before clang.

llvm-svn: 255794
diff --git a/llvm/tools/CMakeLists.txt b/llvm/tools/CMakeLists.txt
index 85b01c3..9b89d87 100644
--- a/llvm/tools/CMakeLists.txt
+++ b/llvm/tools/CMakeLists.txt
@@ -30,11 +30,13 @@
   set(LLVM_TOOL_LLVM_LTO_BUILD Off)
 endif()
 
-# Add LTO, llvm-ar, and llvm-config before clang, ExternalProject requires
-# targets specified in DEPENDS to exist before the call to ExternalProject_Add.
+# Add LTO, llvm-ar, llvm-config, and llvm-profdata before clang, ExternalProject
+# requires targets specified in DEPENDS to exist before the call to
+# ExternalProject_Add.
 add_llvm_tool_subdirectory(lto)
 add_llvm_tool_subdirectory(llvm-ar)
 add_llvm_tool_subdirectory(llvm-config)
+add_llvm_tool_subdirectory(llvm-profdata)
 
 # Projects supported via LLVM_EXTERNAL_*_SOURCE_DIR need to be explicitly
 # specified.