Setting PATH to anything is useless as a bare command. Its only relevant

if its set in the environement of each command seperately.

Move the PATH setting to the NXBMAKE variable so its picked up to find
the one-off gperf build for the native-xtools target.

Pointed Out by: ngie

Makefile.inc1

@@ -1522,7 +1522,8 @@ cross-tools: .MAKE
 
 NXBENV=		MAKEOBJDIRPREFIX=${OBJTREE}/nxb \
 		INSTALL="sh ${.CURDIR}/tools/install.sh" \
-		VERSION="${VERSION}"
+		VERSION="${VERSION}" \
+		PATH=${PATH}:${OBJTREE}/gperf_for_gcc/usr/bin
 NXBMAKE=	${NXBENV} ${MAKE} \
 		TBLGEN=${OBJTREE}/nxb-bin/usr/bin/tblgen \
 		CLANG_TBLGEN=${OBJTREE}/nxb-bin/usr/bin/clang-tblgen \
@@ -1549,7 +1550,6 @@ native-xtools: .MAKE
 	${NXBMAKE} DIRPRFX=${_gperf}/ depend && \
 	${NXBMAKE} DIRPRFX=${_gperf}/ all && \
 	${NXBMAKE} DIRPRFX=${_gperf}/ DESTDIR=${OBJTREE}/gperf_for_gcc install
-	PATH=${PATH}:${OBJTREE}/gperf_for_gcc/usr/bin
 .endif
 	mkdir -p ${OBJTREE}/nxb-bin/bin
 	mkdir -p ${OBJTREE}/nxb-bin/sbin