[llvm] [XCOFF] make related SD symbols as isFunction (PR #69553)

[James Henderson via llvm-commits]

================
@@ -54,3 +31,4 @@ Symbols:
       - Type:                   AUX_CSECT
         SymbolAlignmentAndType: 5
         StorageMappingClass:    XMC_PR
+
----------------
jh7370 wrote:

Nit: Looks like you've added an additional blank line unnecessarily? Files should end in exactly one \n

https://github.com/llvm/llvm-project/pull/69553