Copy Over Build Script For "libkxld"

Taken From LKM Branch

libkern/kxld/CMakeLists.txt

@@ -0,0 +1,32 @@
+project(libkxld)
+
+add_compile_definitions(
+	PRIVATE
+)
+
+set(DYLIB_INSTALL_NAME "/usr/lib/system/libkxld.dylib")
+add_darling_library(libkxld
+	kxld.c
+	kxld_array.c
+	kxld_copyright.c
+	kxld_demangle.c
+	kxld_dict.c
+	kxld_kext.c
+	kxld_object.c
+	kxld_reloc.c
+	kxld_sect.c
+	kxld_seg.c
+	kxld_splitinfolc.c
+	kxld_srcversion.c
+	kxld_sym.c
+	kxld_symtab.c
+	kxld_util.c
+	kxld_uuid.c
+	kxld_versionmin.c
+	kxld_vtable.c
+)
+make_fat(libkxld)
+target_link_libraries(libkxld system cxxabi)
+set_target_properties(libkxld PROPERTIES OUTPUT_NAME "kxld")
+
+install(TARGETS libkxld DESTINATION libexec/darling/usr/lib/system)