Support Rubinius linking against Homebrew openssl

Internally, ruby-build will want to set `--with-openssl-dir` if we try
to detect Homebrew's OpenSSL or build one for the OS X. However,
Rubinius doesn't support that configure flag. So, this translates
`--with-openssl-dir` to a combination of `--with-lib-dir` and
`--with-include-dir`.

bin/ruby-build

@@ -564,7 +564,20 @@ build_package_rbx() {
       mkdir -p vendor
       ln -s "$RUBY_BUILD_CACHE_PATH" vendor/prebuilt
     fi
-    RUBYOPT="-rubygems $RUBYOPT" ./configure --prefix="$PREFIX_PATH" $RUBY_CONFIGURE_OPTS "${RUBY_CONFIGURE_OPTS_ARRAY[@]}"
+
+    local opt
+    local -a configure_opts
+    for opt in "${RUBY_CONFIGURE_OPTS_ARRAY[@]}"; do
+      if [[ $opt == --with-openssl-dir=* ]]; then
+        local openssl_dir="${opt#*=}"
+        configure_opts[${#configure_opts[@]}]="--with-lib-dir=${openssl_dir}/lib"
+        configure_opts[${#configure_opts[@]}]="--with-include-dir=${openssl_dir}/include"
+      else
+        configure_opts[${#configure_opts[@]}]="$opt"
+      fi
+    done
+
+    RUBYOPT="-rubygems $RUBYOPT" ./configure --prefix="$PREFIX_PATH" $RUBY_CONFIGURE_OPTS "${configure_opts[@]}"
     rake install
     fix_rbx_gem_binstubs "$PREFIX_PATH"
     fix_rbx_irb "$PREFIX_PATH"

share/ruby-build/rbx-2.5.8

 require_llvm 3.5
+install_package "openssl-1.0.1q" "https://www.openssl.org/source/openssl-1.0.1q.tar.gz#b3658b84e9ea606a5ded3c972a5517cd785282e7ea86b20c78aa4b773a047fb7" mac_openssl --if has_broken_mac_openssl
 install_package "rubinius-2.5.8" "https://s3.amazonaws.com/releases.rubini.us/rubinius-2.5.8.tar.bz2#d6b411732aa035865f2855845abe5405119560f0979062672d576601de89e59a" rbx