Android build: work around odd bug with cmake 3.10

For some reason it suddenly cannot figure out which build program
to use. This seems like a weird hack, but works.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

packaging/android/build.sh

@@ -399,6 +399,7 @@ cmake $MOBILE_CMAKE \
 	-DANDROID_NATIVE_LIBSSL="$BUILDROOT/ndk-$ARCH/sysroot/usr/lib/libssl.so" \
 	-DANDROID_NATIVE_LIBCRYPT="$BUILDROOT/ndk-$ARCH/sysroot/usr/lib/libcrypto.so" \
 	-DBUILDTOOLS_REVISION="$ANDROID_BUILDTOOLS_REVISION" \
+	-DCMAKE_MAKE_PROGRAM="make" \
 	"$SUBSURFACE_SOURCE"
 
 # set up the version number