[BOLT][AArch64] Use all supported CPU features on AArch64

[treapster]

Summary

Since we now have +all feature for disassembler, we can use it in BOLT and allow it to disassemble all ARM instructions supported by LLVM.

[treapster]

This comment was removed by treapster.

[treapster]

Ping

[rafauler]

LGTM thanks!

bolt/lib/Core/BinaryContext.cpp

BinaryContext::createBinaryContext(const ObjectFile *File, bool IsPIC,
   StringRef FeaturesStr = "";
   switch (File->getArch()) {
   case llvm::Triple::x86_64:
     ArchName = "x86-64";
     FeaturesStr = "+nopl";
     break;
   case llvm::Triple::aarch64:
     ArchName = "aarch64";
-    FeaturesStr = "+fp-armv8,+neon,+crypto,+dotprod,+crc,+lse,+ras,+rdm,"
-                  "+fullfp16,+spe,+fuse-aes,+rcpc";
+    FeaturesStr = "+all";
     break;
   default:
     return createStringError(std::errc::not_supported,
                              "BOLT-ERROR: Unrecognized machine in ELF file");
   }
 
   auto TheTriple = std::make_unique<Triple>(File->makeTriple());
   const std::string TripleName = TheTriple->str();