app-misc/piper: add ebuild and patches

app-misc/piper/files/piper-0.2.900-ratbagd-sync-with-libratbag.patch-1.patch

@@ -0,0 +1,32 @@
+From 4f560b0d1e13383a075dfe94de106942a2028860 Mon Sep 17 00:00:00 2001
+From: Jente Hidskes <hjdskes@gmail.com>
+Date: Thu, 14 Sep 2017 16:07:51 +0200
+Subject: [PATCH 13/30] ratbagd: sync with libratbag
+
+---
+ piper/ratbagd.py | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/piper/ratbagd.py b/piper/ratbagd.py
+index e74039d..4478cf2 100644
+--- a/piper/ratbagd.py
++++ b/piper/ratbagd.py
+@@ -623,6 +623,7 @@ class RatbagdButton(_RatbagdDBus):
+     ACTION_TYPE_SPECIAL = 2
+     ACTION_TYPE_MACRO = 4
+ 
++    ACTION_SPECIAL_INVALID = -1
+     ACTION_SPECIAL_UNKNOWN = (1 << 30)
+     ACTION_SPECIAL_DOUBLECLICK = (1 << 30) + 1
+     ACTION_SPECIAL_WHEEL_LEFT = (1 << 30) + 2
+@@ -684,6 +685,7 @@ class RatbagdButton(_RatbagdDBus):
+ 
+     """A table mapping a special function to its human-readable description."""
+     SPECIAL_DESCRIPTION = {
++        ACTION_SPECIAL_INVALID: N_("Invalid"),
+         ACTION_SPECIAL_UNKNOWN: N_("Unknown"),
+         ACTION_SPECIAL_DOUBLECLICK: N_("Doubleclick"),
+         ACTION_SPECIAL_WHEEL_LEFT: N_("Wheel Left"),
+-- 
+2.16.1
+