telepathy-python: apply dont-install-generated-errors.py-twice.patch from upstream

srcpkgs/telepathy-python/patches/dont-install-generated-errors.py-twice.patch

@@ -0,0 +1,17 @@
+diff --git a/src/Makefile.am b/src/Makefile.am
+index 135f2f0..ede1fc3 100644
+--- Makefile.am
++++ Makefile.am
+@@ -13,10 +13,12 @@ telepathy_PYTHON = \
+ spec_dir = $(top_srcdir)/spec
+ spec_files := $(patsubst $(spec_dir)%.xml,_generated%.py,$(wildcard $(spec_dir)/*.xml))
+ 
++# We leave _generated/errors.py out of here because there exists a
++# spec/errors.xml file, so that means there'll be a
++# _generated/errors.py in $(spec_files). See fd.o#32526
+ BUILT_SOURCES = \
+ 	_generated/interfaces.py \
+ 	_generated/constants.py \
+-	_generated/errors.py \
+ 	_generated/__init__.py \
+ 	$(spec_files)