Add support for the new (added last week) llvm::Triple::WatchOS and ::TvOS
in places where we check for Triple::IOS.  They're mostly the same as far
as lldb is conerned.
.
Also add a base cass implementation for Process::IsAlive - Greg added this 
last year but it didn't get upstreamed.

llvm-svn: 252227
diff --git a/lldb/source/Plugins/DynamicLoader/Darwin-Kernel/DynamicLoaderDarwinKernel.cpp b/lldb/source/Plugins/DynamicLoader/Darwin-Kernel/DynamicLoaderDarwinKernel.cpp
index 086d641..dc7ec72 100644
--- a/lldb/source/Plugins/DynamicLoader/Darwin-Kernel/DynamicLoaderDarwinKernel.cpp
+++ b/lldb/source/Plugins/DynamicLoader/Darwin-Kernel/DynamicLoaderDarwinKernel.cpp
@@ -162,6 +162,8 @@
             case llvm::Triple::Darwin:
             case llvm::Triple::MacOSX:
             case llvm::Triple::IOS:
+            case llvm::Triple::TvOS:
+            case llvm::Triple::WatchOS:
                 if (triple_ref.getVendor() != llvm::Triple::Apple)
                 {
                    return NULL;