Update emsdk version from 763c2d21 to cef24b4f

[emscripten-bot]

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

emsdk version updated: 763c2d21 => cef24b4f

The following revisions were included in this update:

- cef24b4f Roll llvm-project from 83959f01d350 to 2f9775ad49bf (33 revisions)
- 75605f3c Roll emscripten from ec43f619371c to 2f3d9cc68dde (1 revision)
- d4e9387f Roll emscripten from 4946c02c3801 to ec43f619371c (1 revision)
- 970da17d Roll emscripten from 8be44a7966ad to 4946c02c3801 (2 revisions)
- 84286965 Roll llvm-project from b3a4504bd99b to 83959f01d350 (106 revisions)
- c36617da Roll v8 from 45a68e7aa0d4 to eebbc36f6f06 (35 revisions)
- 6d9c248b Roll binaryen from b97310a2f0c5 to f1b0e46c248c (4 revisions)
- 2613781d Roll llvm-project from 34323ab08e6e to b3a4504bd99b (31 revisions)

Full log: https://chromium.googlesource.com/emscripten-releases/+log/763c2d21..cef24b4f

The following (21) test expectation files were updated by
running the tests with --rebaseline:

codesize/test_codesize_cxx_ctors1.json: 153927 => 153937 [+10 bytes / +0.01%]
codesize/test_codesize_cxx_ctors2.json: 153333 => 153343 [+10 bytes / +0.01%]
codesize/test_codesize_cxx_except.json: 200099 => 200109 [+10 bytes / +0.00%]
codesize/test_codesize_cxx_except_wasm.json: 169465 => 169475 [+10 bytes / +0.01%]
codesize/test_codesize_cxx_except_wasm_legacy.json: 167325 => 167335 [+10 bytes / +0.01%]
codesize/test_codesize_cxx_lto.json: 119542 => 119548 [+6 bytes / +0.01%]
codesize/test_codesize_cxx_mangle.json: 266429 => 266439 [+10 bytes / +0.00%]
codesize/test_codesize_cxx_noexcept.json: 155837 => 155847 [+10 bytes / +0.01%]
codesize/test_codesize_cxx_wasmfs.json: 180955 => 180965 [+10 bytes / +0.01%]
codesize/test_codesize_files_wasmfs.json: 63232 => 63240 [+8 bytes / +0.01%]
codesize/test_codesize_hello_dylink.json: 44105 => 44113 [+8 bytes / +0.02%]
codesize/test_codesize_hello_dylink_all.json: 856207 => 856215 [+8 bytes / +0.00%]
codesize/test_codesize_mem_O3.json: 9135 => 9143 [+8 bytes / +0.09%]
codesize/test_codesize_mem_O3_grow.json: 9470 => 9478 [+8 bytes / +0.08%]
codesize/test_codesize_mem_O3_grow_standalone.json: 9298 => 9306 [+8 bytes / +0.09%]
codesize/test_codesize_mem_O3_standalone.json: 9132 => 9140 [+8 bytes / +0.09%]
codesize/test_codesize_mem_O3_standalone_lib.json: 8325 => 8333 [+8 bytes / +0.10%]
codesize/test_codesize_mem_O3_standalone_narg.json: 8447 => 8455 [+8 bytes / +0.09%]
codesize/test_codesize_mem_O3_standalone_narg_flto.json: 7378 => 7386 [+8 bytes / +0.11%]
codesize/test_codesize_minimal_pthreads.json: 25964 => 25975 [+11 bytes / +0.04%]
codesize/test_codesize_minimal_pthreads_memgrowth.json: 26416 => 26427 [+11 bytes / +0.04%]

Average change: +0.04% (+0.00% - +0.11%)