dev-python/numexpr: use python_get_sitedir for tests

The tests still fail with pypy3, but at least with this change
it doesn't error out on the pushd

Signed-off-by: Andrew Ammerlaan <andrewammerlaan@gentoo.org>

dev-python/numexpr/numexpr-2.8.7.ebuild

@@ -30,7 +30,7 @@ RDEPEND="
 "
 
 python_test() {
-	pushd "${BUILD_DIR}/install/usr/lib/${EPYTHON}/site-packages" >/dev/null || die
+	pushd "${BUILD_DIR}/install/$(python_get_sitedir)" >/dev/null || die
 	"${EPYTHON}" - <<-EOF || die "Tests failed with ${EPYTHON}"
 		import sys,numexpr
 		sys.exit(0 if numexpr.test().wasSuccessful() else 1)