rename environment.c in env_embedded.c to reflect is functionality

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/Makefile b/Makefile
index b2a4853..4246f93 100644
--- a/Makefile
+++ b/Makefile
@@ -3213,7 +3213,7 @@
 	@rm -f $(OBJS) $(obj)*.bak $(obj)ctags $(obj)etags $(obj)TAGS \
 		$(obj)cscope.* $(obj)*.*~
 	@rm -f $(obj)u-boot $(obj)u-boot.map $(obj)u-boot.hex $(ALL)
-	@rm -f $(obj)tools/{crc32.c,environment.c,env/crc32.c,md5.c,sha1.c,inca-swap-bytes}
+	@rm -f $(obj)tools/{crc32.c,env_embedded.c,env/crc32.c,md5.c,sha1.c,inca-swap-bytes}
 	@rm -f $(obj)tools/{image.c,fdt.c,fdt_ro.c,fdt_rw.c,fdt_strerror.c,zlib.h}
 	@rm -f $(obj)tools/{fdt_wip.c,libfdt_internal.h}
 	@rm -f $(obj)cpu/mpc824x/bedbug_603e.c