host/lib/Makefile.am: fix 'make uninstall'

Fix for:
  /bin/bash: -c: line 11: syntax error near unexpected token `|'
  /bin/bash: -c: line 11: `echo "$py_files" |  | sed '$!N;$!N;$!N;$!N;$!N;$!N;$!N;s/\n/ /g' | sed '$!N;$!N;$!N;$!N;s/\n/ /g' | \'

Fixes: OS#5609
Change-Id: I5c18b5479c86333a478b61c4a50ede69af7d6700

host/lib/Makefile.am

@@ -157,6 +157,10 @@ noinst_PYTHON =				\
 	dump_data.py
 endif
 
+# Workaround for generated rule that fails and should be a no-op
+uninstall-usrppythonPYTHON:
+	$(info Skipping uninstall-usrpythonPYTHON (OS#5609))
+
 # common way for generating sources from templates when using
 # BUILT_SOURCES, using parallel build protection.
 gen_sources = $(BUILT_SOURCES)