tests: use $ENV{HOME} instead of hard coded name
This may only only work on Mac.
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 8dcd5ef..8511d26 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -1,7 +1,7 @@
cmake_minimum_required(VERSION 3.4.1)
# TODO: Remove this line and inherit it from the host environment
-set(ANDROID_NDK /Users/donturner/Library/Android/sdk/ndk-bundle)
+set(ANDROID_NDK $ENV{HOME}/Library/Android/sdk/ndk-bundle)
# Include GoogleTest library
set(GOOGLETEST_ROOT ${ANDROID_NDK}/sources/third_party/googletest)