Move init and ueventd scripts from / to /system/etc

There is no reason for these scripts to continue to exist in /, when
they are better suited for /system/etc.  There are problems keeping
them at / as well, particularly that they cannot be updated with
overlayfs.

Bug: 131087886
Bug: 140313207
Test: build/boot
Merged-In: I043d9a02ba588ca37ceba2c4e28ed631792b2586
Change-Id: I043d9a02ba588ca37ceba2c4e28ed631792b2586
diff --git a/init/init.cpp b/init/init.cpp
index f775d8f..592d956 100644
--- a/init/init.cpp
+++ b/init/init.cpp
@@ -135,7 +135,7 @@
 
     std::string bootscript = GetProperty("ro.boot.init_rc", "");
     if (bootscript.empty()) {
-        parser.ParseConfig("/init.rc");
+        parser.ParseConfig("/system/etc/init/hw/init.rc");
         if (!parser.ParseConfig("/system/etc/init")) {
             late_import_paths.emplace_back("/system/etc/init");
         }