[BOOT] Add boot library stubs

BOOT/ENVIRON/APP/BOOTMGR/bootmgr.c

@@ -14,6 +14,7 @@ Abstract:
 --*/
 
 #include "bootmgr.h"
+#include "bootlib.h"
 
 NTSTATUS
 BmMain (
@@ -38,9 +39,20 @@ Return Value:
 --*/
 
 {
-    (VOID)InputParameters;
+    NTSTATUS Status;
+    BOOT_LIBRARY_PARAMETERS LibraryParameters;
 
-    /* TODO: Implement this */
+    LibraryParameters.Flags = 0;
 
-    return STATUS_SUCCESS;
+    //
+    // Initialize the boot library.
+    //
+    Status = BlInitializeLibrary(InputParameters, &LibraryParameters);
+    if (!NT_SUCCESS(Status)) {
+        goto Exit;
+    }
+
+Exit:
+    BlDestroyLibrary();
+    return Status;
 }