6888489 Null environment variables are not overriding crle(1) replaceable environment variables.

PSARC 2008/179 cross link-editor 6671255 link-editor should support cross linking --HG-- rename : usr/src/cmd/sgs/libld/common/libld.chk.msg => deleted_files/usr/src/cmd/sgs/libld/common/libld.chk.msg rename : usr/src/cmd/sgs/libld/common/machsym.intel.c => deleted_files/usr/src/cmd/sgs/libld/common/machsym.intel.c rename : usr/src/uts/intel/amd64/krtld/relmach.h => deleted_files/usr/src/uts/intel/amd64/krtld/relmach.h rename : usr/src/uts/intel/ia32/krtld/relmach.h => deleted_files/usr/src/uts/intel/ia32/krtld/relmach.h rename : usr/src/uts/sparc/krtld/relmach.h => deleted_files/usr/src/uts/sparc/krtld/relmach.h rename : usr/src/uts/sparc/sys/machelf.h => deleted_files/usr/src/uts/sparc/sys/machelf.h rename : usr/src/cmd/sgs/include/i386/machdep.h => usr/src/cmd/sgs/include/i386/machdep_x86.h rename : usr/src/cmd/sgs/include/sparc/machdep.h => usr/src/cmd/sgs/include/sparc/machdep_sparc.h rename : usr/src/uts/intel/sys/machelf.h => usr/src/uts/common/sys/machelf.h