Automatic rebaseline of codesize expectations. NFC

This is an automatic change generated by tools/maint/rebaseline_tests.py.

The following (2) test expectation files were updated by
running the tests with `--rebaseline`:

```
codesize/test_codesize_minimal_pthreads.json: 26419 => 26409 [-10 bytes / -0.04%]
codesize/test_codesize_minimal_pthreads_memgrowth.json: 26829 => 26819 [-10 bytes / -0.04%]

Average change: -0.04% (-0.04% - -0.04%)
```

Author: kleisauke

test/codesize/test_codesize_minimal_pthreads.json

@@ -1,10 +1,10 @@
 {
   "a.out.js": 7372,
   "a.out.js.gz": 3593,
-  "a.out.nodebug.wasm": 19047,
-  "a.out.nodebug.wasm.gz": 8796,
-  "total": 26419,
-  "total_gz": 12389,
+  "a.out.nodebug.wasm": 19037,
+  "a.out.nodebug.wasm.gz": 8786,
+  "total": 26409,
+  "total_gz": 12379,
   "sent": [
     "a (memory)",
     "b (exit)",
@@ -62,7 +62,6 @@
   "funcs": [
     "$__errno_location",
     "$__memcpy",
-    "$__memset",
     "$__pthread_getspecific",
     "$__pthread_mutex_lock",
     "$__pthread_mutex_trylock",

test/codesize/test_codesize_minimal_pthreads_memgrowth.json

@@ -1,10 +1,10 @@
 {
   "a.out.js": 7781,
   "a.out.js.gz": 3797,
-  "a.out.nodebug.wasm": 19048,
-  "a.out.nodebug.wasm.gz": 8797,
-  "total": 26829,
-  "total_gz": 12594,
+  "a.out.nodebug.wasm": 19038,
+  "a.out.nodebug.wasm.gz": 8787,
+  "total": 26819,
+  "total_gz": 12584,
   "sent": [
     "a (memory)",
     "b (exit)",
@@ -62,7 +62,6 @@
   "funcs": [
     "$__errno_location",
     "$__memcpy",
-    "$__memset",
     "$__pthread_getspecific",
     "$__pthread_mutex_lock",
     "$__pthread_mutex_trylock",