fix(eficore): keep backslashes in command-line arguments

Cargo.lock

@@ -126,7 +126,6 @@ dependencies = [
  "anyhow",
  "bitflags",
  "log",
- "shlex",
  "spin",
  "uefi",
  "uefi-raw",
@@ -339,12 +338,6 @@ dependencies = [
  "digest",
 ]
 
-[[package]]
-name = "shlex"
-version = "2.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f8fadd59c855ef2080decdef8ff161eb6661b86933c9d82e5ba29dc602a55aba"
-
 [[package]]
 name = "simd-adler32"
 version = "0.3.10"