Make wrk2 image ARM-compatible.

This involves some minimal patching. To make sure it doesn't break, this
CL hardcodes specific git commits.

PiperOrigin-RevId: 530949746

images/benchmarks/wrk2/Dockerfile

@@ -0,0 +1,31 @@
+FROM ubuntu:20.04 as build
+
+# Install build dependencies:
+RUN apt-get update && apt-get install -y git build-essential libssl-dev libz-dev
+
+# Clone repo at the commit ID we expect to patch:
+RUN git clone https://github.com/giltene/wrk2.git /tmp/wrk2 \
+ && cd /tmp/wrk2 \
+ && git reset --hard 44a94c17d8e6a0bac8559b53da76848e430cb7a7
+
+# Update LuaJIT to an ARM-compatible version:
+RUN git clone https://luajit.org/git/luajit.git /tmp/luajit \
+ && cd /tmp/luajit \
+ && git reset --hard 224129a8e64bfa219d35cd03055bf03952f167f6 \
+ && cp -ar /tmp/luajit/* /tmp/wrk2/deps/luajit/
+
+# Patch files to make them ARM-compatible:
+RUN cd /tmp/wrk2 \
+ && sed -ri 's/#include <x86intrin.h>//g' src/hdr_histogram.c \
+ && sed -ri 's/\bluaL_reg\b/luaL_Reg/g'   src/script.c
+
+# Make.
+RUN cd /tmp/wrk2 && make
+
+FROM ubuntu:20.04
+RUN set -x \
+        && apt-get update \
+        && apt-get install -y \
+           wget \
+        && rm -rf /var/lib/apt/lists/*
+COPY --from=build /tmp/wrk2/wrk /bin/wrk2

images/benchmarks/wrk2/Dockerfile.x86_64

@@ -1,11 +0,0 @@
-FROM ubuntu:20.04 as build
-RUN apt-get update && apt-get install -y git build-essential libssl-dev libz-dev
-RUN git clone https://github.com/giltene/wrk2.git /tmp/wrk2 && cd /tmp/wrk2 && make
-
-FROM ubuntu:20.04
-RUN set -x \
-        && apt-get update \
-        && apt-get install -y \
-           wget \
-        && rm -rf /var/lib/apt/lists/*
-COPY --from=build /tmp/wrk2/wrk /bin/wrk2