dev-python/httplib2: Avoid optional cryptography dep

Closes: https://bugs.gentoo.org/845336
Signed-off-by: Michał Górny <mgorny@gentoo.org>

dev-python/httplib2/httplib2-0.20.4.ebuild

@@ -40,6 +40,8 @@ PATCHES=( "${FILESDIR}"/${PN}-0.12.1-use-system-cacerts.patch )
 
 src_prepare() {
 	sed -i -e '/--cov/d' setup.cfg || die
+	# cryptography dep is entirely optional, and has a good fallback
+	sed -i -e 's:from cryptography.*:pass:' tests/__init__.py || die
 	distutils-r1_src_prepare
 }