[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/heap/heapmin.cpp

@@ -0,0 +1,19 @@
+//
+// heapmin.cpp
+//
+//      Copyright (c) Microsoft Corporation. All rights reserved.
+//
+// Implementation of _heapmin().
+//
+#include <corecrt_internal.h>
+#include <malloc.h>
+
+// Minimizes the heap, freeing as much memory as possible back to the OS.
+// Returns 0 on success, -1 on failure.
+extern "C" int __cdecl _heapmin()
+{
+    if (!HeapCompact(__acrt_heap, 0))
+        return -1;
+
+    return 0;
+}