Restore test_other.other.test_codesize_cxx_lto after Binaryen fix. NFC (#24783)

Followup to

https://github.com/emscripten-core/emscripten/pull/24777/files#diff-59f6b346090f49748193fef565b0c7e223f93ecef5bb116fa370d0b864af9493

after

WebAssembly/binaryen#7748

landed.

Code size savings are from

WebAssembly/binaryen#7728

Author: kripken

test/code_size/test_codesize_cxx_lto.json

@@ -1,42 +1,40 @@
 {
-  "a.out.js": 19506,
-  "a.out.js.gz": 8014,
-  "a.out.nodebug.wasm": 121757,
-  "a.out.nodebug.wasm.gz": 48787,
-  "total": 141263,
-  "total_gz": 56801,
+  "a.out.js": 19130,
+  "a.out.js.gz": 7843,
+  "a.out.nodebug.wasm": 106474,
+  "a.out.nodebug.wasm.gz": 42624,
+  "total": 125604,
+  "total_gz": 50467,
   "sent": [
     "a (emscripten_resize_heap)",
-    "b (_tzset_js)",
-    "c (_setitimer_js)",
-    "d (_emscripten_runtime_keepalive_clear)",
-    "e (_abort_js)",
-    "f (proc_exit)",
-    "g (fd_write)",
-    "h (fd_seek)",
-    "i (fd_read)",
-    "j (fd_close)",
-    "k (environ_sizes_get)",
-    "l (environ_get)"
+    "b (_setitimer_js)",
+    "c (_emscripten_runtime_keepalive_clear)",
+    "d (_abort_js)",
+    "e (proc_exit)",
+    "f (fd_write)",
+    "g (fd_seek)",
+    "h (fd_read)",
+    "i (fd_close)",
+    "j (environ_sizes_get)",
+    "k (environ_get)"
   ],
   "imports": [
     "a (emscripten_resize_heap)",
-    "b (_tzset_js)",
-    "c (_setitimer_js)",
-    "d (_emscripten_runtime_keepalive_clear)",
-    "e (_abort_js)",
-    "f (proc_exit)",
-    "g (fd_write)",
-    "h (fd_seek)",
-    "i (fd_read)",
-    "j (fd_close)",
-    "k (environ_sizes_get)",
-    "l (environ_get)"
+    "b (_setitimer_js)",
+    "c (_emscripten_runtime_keepalive_clear)",
+    "d (_abort_js)",
+    "e (proc_exit)",
+    "f (fd_write)",
+    "g (fd_seek)",
+    "h (fd_read)",
+    "i (fd_close)",
+    "j (environ_sizes_get)",
+    "k (environ_get)"
   ],
   "exports": [
-    "m (memory)",
-    "n (__wasm_call_ctors)",
-    "o (main)",
-    "p (_emscripten_timeout)"
+    "l (memory)",
+    "m (__wasm_call_ctors)",
+    "n (main)",
+    "o (_emscripten_timeout)"
   ]
 }

test/test_other.py

@@ -9377,8 +9377,7 @@ def test_codesize_minimal_pthreads(self, args):
     'ctors1':    (['-O2', '-sEVAL_CTORS'],),
     'ctors2':    (['-O2', '-sEVAL_CTORS=2'],),
     'wasmfs':    (['-O2', '-sWASMFS'],),
-    # Disabled until https://github.com/WebAssembly/binaryen/pull/7748 lands
-    #'lto':       (['-Oz', '-flto'],),
+    'lto':       (['-Oz', '-flto'],),
   })
   def test_codesize_cxx(self, args):
     # do not check functions in this test as there are a lot of libc++ functions