Add libssh2 to Dockerfile.mingw

Dockerfile.mingw

@@ -29,6 +29,7 @@ RUN curl -L -O http://downloads.sourceforge.net/project/expat/expat/2.1.0/expat-
 RUN curl -L -O http://www.sqlite.org/2015/sqlite-autoconf-3080803.tar.gz
 RUN curl -L -O http://zlib.net/zlib-1.2.8.tar.xz
 RUN curl -L -O http://c-ares.haxx.se/download/c-ares-1.10.0.tar.gz
+RUN curl -L -O http://libssh2.org/download/libssh2-1.5.0.tar.gz
 
 RUN tar xf gmp-6.0.0a.tar.lz
 RUN cd gmp-6.0.0 && \
@@ -88,6 +89,19 @@ RUN cd c-ares-1.10.0 && \
     LIBS="-lws2_32" && \
     make install
 
+RUN tar xf libssh2-1.5.0.tar.gz
+RUN cd libssh2-1.5.0 && \
+    ./configure \
+    --disable-shared \
+    --enable-static \
+    --prefix=/usr/local/$HOST \
+    --host=$HOST \
+    --build=`dpkg-architecture -qDEB_BUILD_GNU_TYPE` \
+    --without-openssl \
+    --with-wincng \
+    LIBS="-lws2_32" && \
+    make install
+
 RUN git clone https://github.com/tatsuhiro-t/aria2
 RUN cd aria2 && autoreconf -i && ./mingw-config && make && \
     $HOST-strip src/aria2c.exe