Fix: incorrect GOOS for "go get" failed to get all dependencies

MobileLibrary/Android/make.bash

@@ -16,7 +16,7 @@ BUILD_TAGS="OPENSSL ${PRIVATE_PLUGINS_TAG}"
 # the latest versions. Outside of Docker, be aware that these dependencies
 # will not be overridden w/ new versions if they already exist in $GOPATH
 
-GOOS=arm go get -d -v -tags "${BUILD_TAGS}" github.com/Psiphon-Labs/psiphon-tunnel-core/MobileLibrary/psi
+GOOS=android go get -d -v -tags "${BUILD_TAGS}" github.com/Psiphon-Labs/psiphon-tunnel-core/MobileLibrary/psi
 if [ $? != 0 ]; then
   echo "..'go get -d -v github.com/Psiphon-Labs/psiphon-tunnel-core/psiphon' failed, exiting"
   exit $?