elfconvert: pull xmas-elf from cates.io (and update version to 0.9)

Bug: 306427497

Change-Id: Ia6e113eb7fdb265273a27bc7d24439de82bbf73f
diff --git a/misc/elfconvert/Cargo.toml b/misc/elfconvert/Cargo.toml
index 1598e82..e8033d9 100644
--- a/misc/elfconvert/Cargo.toml
+++ b/misc/elfconvert/Cargo.toml
@@ -26,4 +26,4 @@
 crc = { version = "1.4.0", default-features = false }
 log = { version = "0.4" }
 stderrlog = { version = "0.5" }
-xmas-elf = { path = "../../../../crates/xmas-elf" }
+xmas-elf = { version = "0.9" }