SVN r325728 breaks build

From: Michael Butler <imb_at_protected-networks.net> Date: Sat, 11 Nov 2017 19:15:35 -0500 · This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:41:13 UTC

As follows:

--- zfs.o ---
In file included from /usr/src/lib/libprocstat/zfs.c:51:
In file included from /usr/obj/usr/src/amd64.amd64/tmp/usr/include/kvm.h:39:
/usr/obj/usr/src/amd64.amd64/tmp/usr/include/vm/vm.h:111:13: error: 
typedef redefinition with different types ('int' vs 'enum boolean_t')
typedef int boolean_t;
             ^
/usr/src/sys/cddl/compat/opensolaris/sys/types.h:84:34: note: previous 
definition is here
typedef enum { B_FALSE, B_TRUE }        boolean_t;
                                         ^
	imb