Added 32-bit Linux build

ConsoleClient/Dockerfile

@@ -11,7 +11,7 @@ ENV DEBIAN_FRONTEND=noninteractive
 RUN apt-get update && \
   apt-get -y install build-essential python-software-properties bzip2 unzip curl \
     git subversion mercurial bzr \
-    upx gcc-mingw-w64-i686 gcc-mingw-w64-x86-64
+    upx gcc-mingw-w64-i686 gcc-mingw-w64-x86-64 gcc-multilib
 
 # Install Go.
 ENV GOROOT=/go \

ConsoleClient/make.bash

@@ -26,3 +26,8 @@ upx --best windows_amd64_psiphon-tunnel-core.exe
 echo 'Building linux-amd64...'
 gox -verbose -osarch linux/amd64 -output linux_amd64_psiphon-tunnel-core
 upx --best linux_amd64_psiphon-tunnel-core
+
+echo 'Building linux-386...'
+CFLAGS=-m32 \
+  gox -verbose -osarch linux/386 -output linux_386_psiphon-tunnel-core
+upx --best linux_386_psiphon-tunnel-core