[NDK]: Add missing RtlImageNtHeaderEx flags.

[RTL]: Implement RtlImageNtHeaderEx and make RtlImageNtHeader call it. This will result in much stricter (and correct) PE loading by default, and enable a flag which can do even stricter checks.
[NTDLL]: Export RtlImageNtHeaderEx (maybe NTOS should export it too, not sure).

svn path=/trunk/; revision=52618

reactos/include/ndk/rtltypes.h

@@ -244,6 +244,11 @@ C_ASSERT(HEAP_CREATE_VALID_MASK == 0x0007F0FF);
 //
 #define RTL_FIND_CHAR_IN_UNICODE_STRING_CASE_INSENSITIVE    4
 
+//
+// RtlImageNtHeaderEx Flags
+//
+#define RTL_IMAGE_NT_HEADER_EX_FLAG_NO_RANGE_CHECK          0x00000001
+
 //
 // Codepages
 //