Enable Python3 Build on Mac and Windows

Author: tobyroseman

oss_local_scripts/install_python_toolchain.sh

@@ -61,12 +61,20 @@ fi
 if [[ $haspython == 0 ]]; then
         if [[ $OSTYPE == darwin* ]]; then
                 if [ ! -e miniconda.sh ]; then
-                        download_file http://repo.continuum.io/miniconda/Miniconda-latest-MacOSX-x86_64.sh miniconda.sh
+                        if [[ ${PYTHON_VERSION} == "python3.4m" ]]; then
+                                download_file http://repo.continuum.io/miniconda/Miniconda3-3.16.0-MacOSX-x86_64.sh miniconda.sh
+                        else
+                                download_file http://repo.continuum.io/miniconda/Miniconda-latest-MacOSX-x86_64.sh miniconda.sh
+                        fi
                 fi
                 bash ./miniconda.sh -p $PWD/deps/conda -b
         elif [[ "$OSTYPE" == "msys" ]]; then
                 if [ ! -e miniconda.exe ]; then
-                        download_file http://repo.continuum.io/miniconda/Miniconda-latest-Windows-x86_64.exe miniconda.exe
+                        if [[ ${PYTHON_VERSION} == "python3.4m" ]]; then
+                                download_file https://repo.continuum.io/miniconda/Miniconda3-3.16.0-Windows-x86_64.exe miniconda.exe
+                        else
+                                download_file http://repo.continuum.io/miniconda/Miniconda-latest-Windows-x86_64.exe miniconda.exe
+                        fi
                 fi
                 cmd /C "miniconda.exe /S /RegisterPython=0 /AddToPath=0 /D=`cygpath -w $PWD/deps/conda/bin`"
                 mkdir -p $PWD/deps/conda/lib