[libc][NFC][Obvious] Add a missing dep.

Siva Chandra · Siva Chandra · commit ffb254978cf4 · 2021-01-18T22:04:20.000-08:00
diff --git a/libc/include/CMakeLists.txt b/libc/include/CMakeLists.txt
@@ -119,6 +119,7 @@ add_gen_header(
   DEF_FILE unistd.h.def
   GEN_HDR unistd.h
   DEPENDS
+    .libc_posix_types
     .llvm_libc_common_h
 )
 
