dev-python/u-msgpack: tweak tests for big-endian platforms

Noticed test failures on powerpc and powerpc64.

Sent upstream as: https://github.com/vsergeev/u-msgpack-python/pull/31

Package-Manager: Portage-2.3.10, Repoman-2.3.3

dev-python/u-msgpack/u-msgpack-2.4.1.ebuild

@@ -24,6 +24,8 @@ DEPEND="${RDEPEND}
 
 S=${WORKDIR}/${MY_P}
 
+PATCHES=("${FILESDIR}"/${P}-little-endian.patch)
+
 python_test() {
 	py.test -v || die "Tests fail with ${EPYTHON}"
 }