[lld] [LLD][ELF] Add `-z execute-only-report` that checks PURECODE section flags (PR #128883)

[Csanád Hajdú via llvm-commits]

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+// REQUIRES: aarch64
+
+// RUN: llvm-mc --triple=aarch64 --filetype=obj -o %t.o %s
+// RUN: ld.lld --defsym absolute=0xf0000000 -z execute-only-report=none --fatal-warnings %t.o -o /dev/null
+// RUN: ld.lld --defsym absolute=0xf0000000 -z execute-only-report=warning %t.o -o /dev/null 2>&1 \
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Il-Capitano wrote:

Done.

https://github.com/llvm/llvm-project/pull/128883