[UCRT] Import Microsoft.Windows.SDK.CRTSource version 10.0.22621.3

Imported from https://www.nuget.org/packages/Microsoft.Windows.SDK.CRTSource/10.0.22621.3
License: MIT

sdk/lib/ucrt/stdlib/llabs.cpp

@@ -0,0 +1,19 @@
+//
+// llabs.cpp
+//
+//      Copyright (c) Microsoft Corporation. All rights reserved.
+//
+// Defines llabs(), which computes the absolute value of a number.
+//
+#include <stdlib.h>
+
+
+
+#pragma function(llabs)
+
+
+
+extern "C" long long __cdecl llabs(long long const number)
+{
+	return number >= 0 ? number : -number;
+}