[LLD][COFF] Append a terminator entry to redirection metadata (#115202)

For MSVC compatibility.
diff --git a/lld/test/COFF/arm64ec-loadcfg.s b/lld/test/COFF/arm64ec-loadcfg.s
index d7df963..65a0e52 100644
--- a/lld/test/COFF/arm64ec-loadcfg.s
+++ b/lld/test/COFF/arm64ec-loadcfg.s
@@ -30,7 +30,10 @@
 # LOADCFG-NEXT: ]
 
 # RUN: llvm-readobj --hex-dump=.test %t.dll | FileCheck --check-prefix=TEST %s
-# TEST: 0x180003000 00000000 00000000 00000000
+# TEST: 0x180004000 00000000 00000000 00000000
+
+# RUN: llvm-readobj --hex-dump=.a64xrm %t.dll | FileCheck --check-prefix=A64XRM %s
+# A64XRM: 0x180003000 00000000 00000000                   ........
 
 .section .test,"dr"
         .rva __arm64x_native_entrypoint