build: install zlib from alpine packages (#5317)

scripts/install-glibc.sh

@@ -2,19 +2,6 @@
 
 set -euo pipefail
 
-case $TARGETARCH in
-amd64)
- target=x86_64
- ;;
-arm64)
- target=arm64
- ;;
-*)
- echo "$TARGETARCH is not supported"
- exit 1
- ;;
-esac
-
 url=$(
  set -euo pipefail
  curl -s \
@@ -31,14 +18,9 @@ apk add --no-cache --force-overwrite "glibc-${GLIBC_VERSION}.apk"
 rm "glibc-${GLIBC_VERSION}.apk"
 
 # Install zlib
-mkdir /tmp/libz
-
 apk add --no-cache --virtual .glibc-build-deps \
  tar \
+ zlib \
  zstd
 
-curl --retry 5 --retry-delay 5 -sL https://www.archlinux.org/packages/core/${target}/zlib/download | tar -x --zstd -C /tmp/libz
-mv /tmp/libz/usr/lib/libz.so* /usr/glibc-compat/lib
-rm -rf /tmp/libz
-
 apk del --no-network --purge .glibc-build-deps