[ELF/AArch64] Set correct loader name in linking context

[zatrazz]

Summary

This patch reimplements ELFLinkingContext::getDefaultInterpreter for aarch64
with correct loader name. It is required to exclude the loader from DT_NEEDED
in shared library creation.

[ruiu]

LGTM

lib/ReaderWriter/ELF/AArch64/AArch64LinkingContext.h

94

Remove "virtual" -- "override" implies that.

lib/ReaderWriter/ELF/AArch64/AArch64LinkingContext.h

bool isRelativeReloc(const Reference &r) const override {
     switch (r.kindValue()) {
     case llvm::ELF::R_AARCH64_IRELATIVE:
     case llvm::ELF::R_AARCH64_RELATIVE:
       return true;
     default:
       return false;
     }
   }
+
+  /// \brief The path to the dynamic interpreter
+  virtual StringRef getDefaultInterpreter() const override {
+    return "/lib/ld-linux-aarch64.so.1";
+  }
 };
 } // end namespace elf
 } // end namespace lld
 
 #endif