[K/N] Enable Kernel framework

Export only minimal set of headers that is required for Hypervisor.

kotlin-native/platformLibs/src/platform/osx/Kernel.def

@@ -0,0 +1,6 @@
+depends = darwin posix
+language = C
+package = platform.Kernel
+
+headers = Kernel/kern/hv_io_notifier.h
+headerFilter = Kernel/**

kotlin-native/platformLibs/src/platform/osx/Kernel.def.disabled

@@ -1,6 +0,0 @@
-language = Objective-C
-package = platform.Kernel
-modules = Kernel
-compilerOpts = -framework Kernel
-linkerOpts = -framework Kernel
-#Disabled: Framework without module