[lldb-dap] Add missing tablegen dependency to lldb-dap (llvm#172891)

rdar://165929985
(cherry picked from commit 56db241)

Author: kastiglione

lldb/tools/lldb-dap/tool/CMakeLists.txt

@@ -9,6 +9,11 @@ add_lldb_tool(lldb-dap
     lldbDAP
   )
 
+add_dependencies(lldb-dap
+  LLDBDAPOptionsTableGen
+  ${tablegen_deps}
+)
+
 if(APPLE)
   configure_file(
     ${CMAKE_CURRENT_SOURCE_DIR}/lldb-dap-Info.plist.in