Convert 7 more portability targets with all deps in exported_deps

Summary:
Convert asm, atomic, dirent, fcntl, fmt_compile, memory, sched from
dual fbcode_target/non_fbcode_target to fb_dirsync_cpp_library.

These targets were skipped by --conservative mode in last diff because their
fbcode and xplat definitions had different deps/exported_deps splits
(e.g., :sockets was private in fbcode but exported in xplat).

fix: put ALL deps from both definitions into exported_deps. This is
strictly more permissive — consumers get more transitive visibility,
not less — so nothing breaks.

This is on the path to removing dirsync entirely — there's no reason to keep it anymore. Removing it would significantly reduce code complexity and developer cognitive overhead.

https://fb.workplace.com/groups/fbsource.dev/permalink/3906759792803147/

Reviewed By: mzlee

Differential Revision: D94741336

fbshipit-source-id: 2bc9a59d7696c8022b72eb4a748ca8c8f74a7f10

Author: rexzhang123

third-party/folly/src/folly/portability/CMakeLists.txt

@@ -65,7 +65,7 @@ folly_add_library(
     Dirent.cpp
   HEADERS
     Dirent.h
-  DEPS
+  EXPORTED_DEPS
     folly_portability_windows
 )
 
@@ -85,11 +85,10 @@ folly_add_library(
     Fcntl.cpp
   HEADERS
     Fcntl.h
-  DEPS
-    folly_portability_sockets
-    folly_portability_sys_stat
   EXPORTED_DEPS
     folly_portability
+    folly_portability_sockets
+    folly_portability_sys_stat
     folly_portability_windows
 )