Mention CPU .o files on tips page. (#15436)

Follow-up to https://github.com/openxla/iree/pull/15412
diff --git a/docs/website/docs/developers/general/developer-tips.md b/docs/website/docs/developers/general/developer-tips.md
index 04b8a67..c53d693 100644
--- a/docs/website/docs/developers/general/developer-tips.md
+++ b/docs/website/docs/developers/general/developer-tips.md
@@ -170,6 +170,7 @@
     module_abs_dispatch_0_system_elf_x86_64.codegen.bc
     module_abs_dispatch_0_system_elf_x86_64.linked.bc
     module_abs_dispatch_0_system_elf_x86_64.optimized.bc
+    module_abs_dispatch_0_system_elf_x86_64.o
     module_abs_dispatch_0_system_elf_x86_64.s
     module_abs_dispatch_0_system_elf_x86_64.so
     simple_abs_cpu.vmfb