lib32/libsoft: Store object files in a more consistent structure.

Having objects in world32 and a sysroot in lib32 was confusing and
inconsistent with the normal build.  Now objects are stored in
obj-lib32 (or obj-libsoft) and the sysroot (analagous to WORLDTMP)
is stored in obj-lib32/tmp.

Sponsored by:	Dell EMC Isilon

Makefile.libcompat

@@ -79,8 +79,8 @@ LIBCOMPAT${_var}?=	${LIB${LIBCOMPAT}${_var}}
 .endfor
 
 # Shared flags
-LIBCOMPAT_OBJTREE?=	${OBJTREE}${.CURDIR}/world${libcompat}
-LIBCOMPATTMP?=		${OBJTREE}${.CURDIR}/lib${libcompat}
+LIBCOMPAT_OBJTREE?=	${OBJTREE}${.CURDIR}/obj-lib${libcompat}
+LIBCOMPATTMP?=		${LIBCOMPAT_OBJTREE}/tmp
 
 LIBCOMPATCFLAGS+=	${LIBCOMPATCPUFLAGS} \
 			-L${LIBCOMPATTMP}/usr/lib${libcompat} \