apply patch from @fengmk2 for iojs 32 bit build support - refs #399

scripts/build_against_node.sh

@@ -51,10 +51,19 @@ if [[ $(uname -s) == 'Linux' ]]; then
     # node v0.8 and above provide pre-built 32 bit and 64 bit binaries
     # so here we use the 32 bit ones to also test 32 bit builds
     NVER=`node -v`
-    wget http://nodejs.org/dist/${NVER}/node-${NVER}-${platform}-x86.tar.gz
-    tar xf node-${NVER}-${platform}-x86.tar.gz
     # enable 32 bit node
     export PATH=$(pwd)/node-${NVER}-${platform}-x86/bin:$PATH
+    if [[ ${NODE_VERSION:0:4} == 'iojs' ]]; then
+        wget http://iojs.org/dist/${NVER}/iojs-${NVER}-${platform}-x86.tar.gz
+        tar xf iojs-${NVER}-${platform}-x86.tar.gz
+        # enable 32 bit iojs
+        export PATH=$(pwd)/iojs-${NVER}-${platform}-x86/bin:$PATH
+    else
+        wget http://nodejs.org/dist/${NVER}/node-${NVER}-${platform}-x86.tar.gz
+        tar xf node-${NVER}-${platform}-x86.tar.gz
+        # enable 32 bit node
+        export PATH=$(pwd)/node-${NVER}-${platform}-x86/bin:$PATH
+    fi
     # install 32 bit compiler toolchain and X11
     # test source compile in 32 bit mode with internal libsqlite3
     CC=gcc-4.6 CXX=g++-4.6 npm install --build-from-source