Fix 'make bmake' top-level bootstrapping.

Fixes:	ee10666327

Makefile

@@ -458,7 +458,7 @@ MMAKE=		${MMAKEENV} ${MAKE} \
 		OBJTOP=${MYMAKE:H}/obj \
 		OBJROOT='$${OBJTOP}/' \
 		MAKEOBJDIRPREFIX= \
-		MAN= -DNO_SHARED \
+		MK_MAN=no -DNO_SHARED \
 		-DNO_CPU_CFLAGS MK_WERROR=no \
 		-DNO_SUBDIR \
 		DESTDIR= PROGNAME=${MYMAKE:T}

usr.bin/bmake/Makefile.inc

@@ -9,9 +9,11 @@
 
 .if exists(${.CURDIR}/tests)
 PROG= make
+.if ${PROGNAME:U} != "bmake"
 LINKS= ${BINDIR}/make ${BINDIR}/bmake
 MLINKS= ${MAN} b${MAN}
 .endif
+.endif
 
 .if !defined(MK_SHARED_TOOLCHAIN) || ${MK_SHARED_TOOLCHAIN} == "no"
 NO_SHARED?=     YES