[llvm] [AArch64] Add support for SHF_AARCH64_PURECODE ELF section flag (1/3) (PR #125687)

[Csanád Hajdú via llvm-commits]

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@@ -1300,7 +1300,10 @@ enum : unsigned {
   SHF_MIPS_STRING = 0x80000000,
 
   // Make code section unreadable when in execute-only mode
-  SHF_ARM_PURECODE = 0x20000000
+  SHF_ARM_PURECODE = 0x20000000,
+
+  // Section contains only program instructions and no program data.
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Il-Capitano wrote:

Should I copy the comment above the ARM flag as well?

https://github.com/llvm/llvm-project/pull/125687