File disable-building-pv-shim.patch of Package xen.12874

--- xen-4.11.0-testing/tools/firmware/Makefile.orig	2018-04-20 10:41:02.186884556 -0600
+++ xen-4.11.0-testing/tools/firmware/Makefile	2018-04-20 10:41:24.675182540 -0600
@@ -2,7 +2,7 @@ XEN_ROOT = $(CURDIR)/../..
 include $(XEN_ROOT)/tools/Rules.mk
 
 ifneq ($(XEN_TARGET_ARCH),x86_32)
-CONFIG_PV_SHIM := y
+CONFIG_PV_SHIM := n
 endif
 
 # hvmloader is a 32-bit protected mode binary.