Scan all init.*.rc files for flash_recovery service.

Clockwork builds may rename init.rc to init.core.rc. Change the OTA
script to scan all init.*.rc files to determine the proper location for
install-recovery.sh.

Bug: 22128990
Change-Id: Icad3497d1663e074b938919b40fc239c84fbeb2b
(cherry picked from commit 610754e5ad)

tools/releasetools/common.py

@@ -1375,18 +1375,28 @@ fi
        'bonus_args': bonus_args}
 
   # The install script location moved from /system/etc to /system/bin
-  # in the L release.  Parse the init.rc file to find out where the
+  # in the L release.  Parse init.*.rc files to find out where the
   # target-files expects it to be, and put it there.
   sh_location = "etc/install-recovery.sh"
-  try:
-    with open(os.path.join(input_dir, "BOOT", "RAMDISK", "init.rc")) as f:
+  found = False
+  init_rc_dir = os.path.join(input_dir, "BOOT", "RAMDISK")
+  init_rc_files = os.listdir(init_rc_dir)
+  for init_rc_file in init_rc_files:
+    if (not init_rc_file.startswith('init.') or
+        not init_rc_file.endswith('.rc')):
+      continue
+
+    with open(os.path.join(init_rc_dir, init_rc_file)) as f:
       for line in f:
         m = re.match(r"^service flash_recovery /system/(\S+)\s*$", line)
         if m:
           sh_location = m.group(1)
-          print "putting script in", sh_location
+          found = True
           break
-  except (OSError, IOError) as e:
-    print "failed to read init.rc: %s" % (e,)
+
+    if found:
+      break
+
+  print "putting script in", sh_location
 
   output_sink(sh_location, sh)