0.12.2 RC2: avoid deprecated wasm intrinsics

PiperOrigin-RevId: 376682795
diff --git a/debian/changelog b/debian/changelog
index 2a29c98..d120188 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,8 +1,9 @@
 highway (0.12.2-1) UNRELEASED; urgency=medium
 
   * fix scalar-only test and Windows macro conflict with Load/StoreFence
+  * replace deprecated wasm intrinsics
 
- -- Jan Wassenberg <janwas@google.com>  Thu, 27 May 2021 15:00:00 +0200
+ -- Jan Wassenberg <janwas@google.com>  Mon, 31 May 2021 16:00:00 +0200
 
 highway (0.12.1-1) UNRELEASED; urgency=medium
 
diff --git a/g3doc/release_testing_process.md b/g3doc/release_testing_process.md
index 24f1a21..14ca58f 100644
--- a/g3doc/release_testing_process.md
+++ b/g3doc/release_testing_process.md
@@ -55,9 +55,11 @@
 #### JPEG XL Webassembly
 
 ```
-sudo docker run -it --rm -v $HOME/jpeg-xlm:/jpeg-xlm -w /jpeg-xlm gcr.io/jpegxl/jpegxl-builder
-mkdir -p /jpeg-xlm/em_cache
-export EM_CACHE=/jpeg-xlm/em_cache
+sudo docker pull gcr.io/jpegxl/jpegxl-builder
+sudo docker run -it --rm -v $HOME/libjxl:/libjxl -w /libjxl gcr.io/jpegxl/jpegxl-builder@sha256:40590aed7021cc1864cf7f6f554e8a435240d151ca6ff9a6eb15ad86cde1d286
+rm -rf build-wasm32
+mkdir -p /libjxl/em_cache
+export EM_CACHE=/libjxl/em_cache
 export V8=/opt/.jsvu/v8
 source /opt/emsdk/emsdk_env.sh
 BUILD_TARGET=wasm32 ENABLE_WASM_SIMD=1 SKIP_TEST=1 PACK_TEST=1 emconfigure ./ci.sh release