Workaround 3.3.0 crash on aarch64

Ruby 3.3.0 has a bug which crashs many practical programs on
linux-aarch64 (especially on Linux VMs on macOS, e.g. Docker Desktop).
https://bugs.ruby-lang.org/issues/20085

This bug is fixed in upstream and is planned to be backported, but no
date is given yet for the 3.3.1 release.
ruby/ruby#9371

This patch workarounds this bug by passing ASFLAGS to ./configure as
described in https://bugs.ruby-lang.org/issues/20085#note-5 .

Author: osyoyu

3.3/alpine3.18/Dockerfile

@@ -252,6 +252,12 @@ RUN set -eux; \
 			export LIBS='-lucontext'; \
 			;; \
 	esac; \
+{{ ) else "" end -}}
+{{ if .version | . == "3.3.0" then ( -}}
+	# workaround crash on aarch64 Linux (e.g. Docker Desktop on macOS)
+	# https://bugs.ruby-lang.org/issues/20085#note-5
+	# https://github.com/ruby/ruby/pull/9371
+	export ASFLAGS="${ASFLAGS:-} -mbranch-protection=pac-ret"; \
 {{ ) else "" end -}}
 	gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)"; \
 	./configure \