dev-python/dropbox-sdk-python: fix dependency on dev-python/stone

The format used for it became invalid.

Closes: https://bugs.gentoo.org/892569
Signed-off-by: Viorel Munteanu <ceamac@gentoo.org>

dev-python/dropbox-sdk-python/dropbox-sdk-python-11.36.0.ebuild

@@ -21,6 +21,8 @@ RDEPEND="
 	>=dev-python/stone-2.0.0[${PYTHON_USEDEP}]
 "
 
+PATCHES=( "${FILESDIR}"/${P}-setuptools-67.patch )
+
 distutils_enable_tests pytest
 
 python_prepare_all() {