Revert "Move /default.prop to /system/etc/prop.default"

This reverts commit fad00e43186fb699c924e436f4cc61a88b055ed2.

init fails to read default.prop under recovery:
init: Couldn't load properties from /default.prop: Too many symbolic links encountered

Bug: 62525809
Change-Id: I133e9025693e3e01278ec73c8d08860fc89d314b
diff --git a/tools/releasetools/sign_target_files_apks.py b/tools/releasetools/sign_target_files_apks.py
index 71311e6..2e0b44d 100755
--- a/tools/releasetools/sign_target_files_apks.py
+++ b/tools/releasetools/sign_target_files_apks.py
@@ -235,21 +235,15 @@
     # System properties.
     elif info.filename in ("SYSTEM/build.prop",
                            "VENDOR/build.prop",
-                           "SYSTEM/etc/prop.default",
-                           "BOOT/RAMDISK/default.prop",  # legacy
-                           "ROOT/default.prop",  # legacy
-                           "RECOVERY/RAMDISK/prop.default",
-                           "RECOVERY/RAMDISK/default.prop"):  # legacy
+                           "BOOT/RAMDISK/default.prop",
+                           "ROOT/default.prop",
+                           "RECOVERY/RAMDISK/default.prop"):
       print "rewriting %s:" % (info.filename,)
-      if stat.S_ISLNK(info.external_attr >> 16):
-        new_data = data
-      else:
-        new_data = RewriteProps(data, misc_info)
+      new_data = RewriteProps(data, misc_info)
       common.ZipWriteStr(output_tf_zip, out_info, new_data)
-      if info.filename in ("BOOT/RAMDISK/default.prop",  # legacy
-                           "ROOT/default.prop",  # legacy
-                           "RECOVERY/RAMDISK/prop.default",
-                           "RECOVERY/RAMDISK/default.prop"):  # legacy
+      if info.filename in ("BOOT/RAMDISK/default.prop",
+                           "ROOT/default.prop",
+                           "RECOVERY/RAMDISK/default.prop"):
         write_to_temp(info.filename, info.external_attr, new_data)
 
     elif info.filename.endswith("mac_permissions.xml"):