Fix typo in ArmUnwindInfo::GetUnwindPlan

Summary:
As reported in LLVM bug 41486, the check `(byte1 & 0xf8) == 0xc0` is wrong. We want to check for `11010nnn`,
so the proper value we want to compare against is `0xd0` (`0xc0` would check for the value `11000nnn` which we
already checked for above as described in the bug report).

Reviewers: #lldb, jasonmolenda

Reviewed By: #lldb, jasonmolenda

Subscribers: jasonmolenda, javed.absar, kristof.beyls, lldb-commits

Tags: #lldb

Differential Revision: https://reviews.llvm.org/D60655

llvm-svn: 358479

lldb/source/Symbol/ArmUnwindInfo.cpp

@@ -304,7 +304,7 @@ bool ArmUnwindInfo::GetUnwindPlan(Target &target, const Address &addr,
       // 11001yyy
       // Spare (yyy != 000, 001)
       return false;
-    } else if ((byte1 & 0xf8) == 0xc0) {
+    } else if ((byte1 & 0xf8) == 0xd0) {
       // 11010nnn
       // Pop VFP double-precision registers D[8]-D[8+nnn] saved (as if) by
       // FSTMFDD (see remark d)