run-checker: Add script to build gost.so

It gets built against a 1.1.0 build, on purpose to check that it links
and runs correctly against any libcrypto.so.1.1.

Fixes #21

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from openssl/openssl#22)

run-checker/build-gost.sh

@@ -0,0 +1,39 @@
+#! /bin/bash
+#
+# Run in a directory for a gost engine build.
+# Two subdirectories will be created:
+#
+#    gost-engine	a checkout of https://github.com/gost-engine/engine.git
+#    openssl		a checkout of https://github.com/openssl/openssl.git
+#
+# Required ubuntu packages to run this script:
+#
+#    build-essential
+#    cmake
+#    perl
+#    git
+
+if [ -d openssl ]; then
+    (cd openssl; git pull --rebase)
+else
+    git clone -b OpenSSL_1_1_0-stable --depth 1 --single-branch \
+	https://github.com/openssl/openssl.git openssl
+fi
+
+if [ -d gost-engine ]; then
+    (cd gost-engine; git pull --rebase)
+else
+    git clone https://github.com/gost-engine/engine.git gost-engine
+fi
+
+OPENSSL_PREFIX=$(pwd)/openssl/_install
+(
+    cd openssl
+    ./config --prefix=$OPENSSL_PREFIX \
+	&& make -j8 build_libs \
+	&& make install_dev
+) && (
+    cd gost-engine
+    cmake -DOPENSSL_ROOT_DIR=$OPENSSL_PREFIX .
+    make
+)