native tools must reliably use a native adjunct, even if that's inconvenient
While it is perhaps convenient for native tools to use updated versions
of certain things like libxml it is imperative that those versions are
_also_ build for the build machine.  Thus they need to be in the native
adjunct (even if that native adjunct is thus not /).
Fix the native adjunct to be rooted similarly to the adjunct proto (that
is, at /), and fix SMF to use it correctly

*** 71,81 ****
          -L$(ROOTONBLDLIBMACH) \
          '-R$$ORIGIN/../../lib/$(MACH)' \
          -ldwarf
  DWARFCPPFLAGS   = -I../../dwarf/common
  
! LDFLAGS         += -L$(NATIVE_ADJUNCT)/lib
  LDLIBS          += -lz -lelf
  CPPFLAGS        += -D_REENTRANT
  CFLAGS          += $(CTF_FLAGS)
  LINTFLAGS       += -mnux
  
--- 71,81 ----
          -L$(ROOTONBLDLIBMACH) \
          '-R$$ORIGIN/../../lib/$(MACH)' \
          -ldwarf
  DWARFCPPFLAGS   = -I../../dwarf/common
  
! LDFLAGS         += -L$(NATIVE_ADJUNCT)/usr/lib
  LDLIBS          += -lz -lelf
  CPPFLAGS        += -D_REENTRANT
  CFLAGS          += $(CTF_FLAGS)
  LINTFLAGS       += -mnux