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

Since we now have +all feature for AArch64 disassembler, we can use it
in BOLT and allow it to disassemble all ARM instructions supported by LLVM.

Reviewed by: rafauler

Differential Revision: https://reviews.llvm.org/D129139

bolt/lib/Core/BinaryContext.cpp

@@ -124,8 +124,7 @@ BinaryContext::createBinaryContext(const ObjectFile *File, bool IsPIC,
     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,