Build Update

1. Use the same docker image as the wolfSSL python project.
2. Remove the absolute path to the python interpreter. They just need to
be in the path. (For example, you might install old versions in /opt and
add their subdirs to the path while the latest runs out of its location.)
3. Build the name of python, pip, and venv_ based on the version.

make/manylinux1/build_wheels.sh

@@ -6,5 +6,5 @@ docker run \
     --rm \
     -v `pwd`:/wolfcrypt-py \
     -w /wolfcrypt-py \
-    quay.io/pypa/manylinux1_x86_64 \
+    wolfssl/manylinux1-x86_64 \
     bash -c "make/manylinux1/build.sh"

make/osx/build_wheels.sh

@@ -1,17 +1,22 @@
 set -e
 set +x
 
-for PYVERSION in 2.7 3.6 3.7; do
-    virtualenv -p /Library/Frameworks/Python.framework/Versions/${PYVERSION}/bin/python${PYVERSION} venv_${PYVERSION}
-    . ./venv_${PYVERSION}/bin/activate
-    curl https://bootstrap.pypa.io/get-pip.py | python
-    pip install -r requirements/setup.txt
-    python setup.py bdist_wheel
-    pip install -r requirements/test.txt
+for VER in 2.7 3.6 3.7; do
+    PIP="pip${VER}"
+    PYTHON="python${VER}"
+    VENV="venv_${VER}"
+
+    ${PIP} install virtualenv
+    virtualenv -p ${PYTHON} ${VENV}
+    . ./${VENV}/bin/activate
+    curl https://bootstrap.pypa.io/get-pip.py | ${PYTHON}
+    ${PIP} install -r requirements/setup.txt
+    ${PYTHON} setup.py bdist_wheel
+    ${PIP} install -r requirements/test.txt
     set +e
-    pip uninstall -y wolfcrypt
+    ${PIP} uninstall -y wolfcrypt
     set -e
-    pip install wolfcrypt --no-index -f dist
+    ${PIP} install wolfcrypt --no-index -f dist
     rm -rf tests/__pycache__
     py.test tests
     deactivate