🍎 Don't run p4a inside virtualenv/venv

because it seems that hostpython's build scripts gets confused on about locating the `pyconfig.h` file

**Note:** This only happens to macOS platform

.travis.yml

@@ -52,7 +52,7 @@ jobs:
         # installs java 1.8, android's SDK/NDK and p4a
         - make -f ci/makefiles/osx.mk
         - export JAVA_HOME=/Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home
-      script: make testapps/armeabi-v7a PYTHON_WITH_VERSION=python3
+      script: make testapps-no-venv/armeabi-v7a
     - <<: *testapps
       name: Rebuild updated recipes
       script: travis_wait 30 make docker/run/make/rebuild_updated_recipes

Makefile

@@ -47,6 +47,14 @@ testapps/%: virtualenv
     python setup.py apk --sdk-dir $(ANDROID_SDK_HOME) --ndk-dir $(ANDROID_NDK_HOME) \
     --arch=$($@_APP_ARCH)
 
+testapps-no-venv/%:
+	pip3 install Cython==0.28.6
+	pip3 install -e .
+	$(eval $@_APP_ARCH := $(shell basename $*))
+	cd testapps/on_device_unit_tests/ && \
+    python3 setup.py apk --sdk-dir $(ANDROID_SDK_HOME) --ndk-dir $(ANDROID_NDK_HOME) \
+    --arch=$($@_APP_ARCH)
+
 clean:
 	find . -type d -name "__pycache__" -exec rm -r {} +
 	find . -type d -name "*.egg-info" -exec rm -r {} +