Force .eh_frame emission on AArch64

We need to force the emission of the EH Frame section (currently done via SupportsCompactUnwindWithoutEHFrame in the MCObjectFileInfo for the target), since libunwind doesn't yet support dynamically registering compact unwind information at run-time.

(cherry picked from commit 60e0418)
(cherry picked from commit 6275013)
(cherry picked from commit b62bce1)
(cherry picked from commit e2adfc2)
(cherry picked from commit 702f88a)

Author: Cody Tapscott

llvm/lib/MC/MCObjectFileInfo.cpp

@@ -69,10 +69,11 @@ void MCObjectFileInfo::initMachOMCObjectFileInfo(const Triple &T) {
           MachO::S_ATTR_STRIP_STATIC_SYMS | MachO::S_ATTR_LIVE_SUPPORT,
       SectionKind::getReadOnly());
 
-  if (T.isOSDarwin() &&
-      (T.getArch() == Triple::aarch64 || T.getArch() == Triple::aarch64_32 ||
-      T.isSimulatorEnvironment()))
-    SupportsCompactUnwindWithoutEHFrame = true;
+  // Disabled for now, since we need to emit EH Frames for stack unwinding in the JIT
+  //if (T.isOSDarwin() &&
+  //    (T.getArch() == Triple::aarch64 || T.getArch() == Triple::aarch64_32 ||
+  //    T.isSimulatorEnvironment()))
+  //  SupportsCompactUnwindWithoutEHFrame = true;
 
   switch (Ctx->emitDwarfUnwindInfo()) {
   case EmitDwarfUnwindType::Always: