[JITLink] Add yet more detail to MachO/x86-64 unsupported relocation errors.

Knowing the address/symbolnum field values makes it easier to identify the
unsupported relocation, and provides enough information for the full bit
pattern of the relocation to be reconstructed.

llvm-svn: 358833

llvm/lib/ExecutionEngine/JITLink/JITLink_MachO_x86_64.cpp

@@ -88,7 +88,10 @@ private:
     }
 
     return make_error<JITLinkError>(
-        "Unsupported x86-64 relocation: kind=" + formatv("{0:x1}", RI.r_type) +
+        "Unsupported x86-64 relocation: address=" +
+        formatv("{0:x8}", RI.r_address) +
+        ", symbolnum=" + formatv("{0:x6}", RI.r_symbolnum) +
+        ", kind=" + formatv("{0:x1}", RI.r_type) +
         ", pc_rel=" + (RI.r_pcrel ? "true" : "false") +
         ", extern= " + (RI.r_extern ? "true" : "false") +
         ", length=" + formatv("{0:d}", RI.r_length));