Run libseccomp tests in parallel

Backport a commit that allows us to run the libseccomp tests in
parallel. This lets us build runc image in 30-40 seconds instead
of 4-5 minutes.

The bash script uses `tail` options that is not supported in busybox
tail so pull in `tail` from coreutils.

Signed-off-by: Natanael Copa <[email protected]>
(cherry picked from commit 165d4da)

embedded-bins/runc/Dockerfile

@@ -2,19 +2,33 @@ ARG BUILDIMAGE
 FROM $BUILDIMAGE AS build
 
 RUN apk add build-base git \
-	curl linux-headers gperf bash pkgconf
+	curl linux-headers gperf bash pkgconf cmd:tail
 
 ENV GOPATH=/go
 
 ARG LIBSECCOMP_VERSION=2.5.5
 RUN curl --proto '=https' --tlsv1.2 -L https://github.com/seccomp/libseccomp/releases/download/v$LIBSECCOMP_VERSION/libseccomp-$LIBSECCOMP_VERSION.tar.gz \
 	| tar -C / -zx
 
-RUN cd /libseccomp-$LIBSECCOMP_VERSION && ./configure --sysconfdir=/etc --enable-static
-
-RUN make -j$(nproc) -C /libseccomp-$LIBSECCOMP_VERSION
-RUN make -j$(nproc) -C /libseccomp-$LIBSECCOMP_VERSION check
-RUN make -C /libseccomp-$LIBSECCOMP_VERSION install
+WORKDIR /libseccomp-$LIBSECCOMP_VERSION
+# tests: add basic support for running tests in parallel
+RUN curl -L https://github.com/seccomp/libseccomp/commit/2380f5788c692796f75e464c61aa877e5c4eb882.patch \
+	| git apply
+# tests: limit the number of bpf-sim-fuzz test iterations
+# https://github.com/seccomp/libseccomp/commit/5878cf2383ccedca3536f47155b13145809ae08e
+# the patch didnt apply due to commit touches .travis/
+# Use sed instead
+RUN sed -i -e 's/50$/5/' tests/*-sim-*.tests
+
+# tests: add support for the LIBSECCOMP_TSTCFG_JOBS env variable
+RUN curl -L https://github.com/seccomp/libseccomp/commit/4c19425fa69cfb4f7de5225d676a26ef0b442e28.patch \
+	| git apply
+RUN ./configure --sysconfdir=/etc --enable-static
+
+RUN make -j$(nproc)
+RUN make -j$(nproc) check-build
+RUN make -C tests check LIBSECCOMP_TSTCFG_JOBS=$(nproc)
+RUN make install
 
 ARG VERSION
 RUN mkdir -p $GOPATH/src/github.com/opencontainers/runc