test.h: add some decls for some of the stuff in efilib.h

In some test cases, it's useful to be able to call some of the very
common stuff in gnu-efi's efilib.h (i.e. CompareGuid()), but including
that header itself is too big for me to tackle right now.

This patch adds a few more decls to test.h.

Signed-off-by: Peter Jones <pjones@redhat.com>

include/test.h

@@ -48,6 +48,17 @@
 #define FreePool(x) free(x)
 #define ReallocatePool(old, oldsz, newsz) realloc(old, newsz)
 
+INTN StrnCmp(IN CONST CHAR16 *s1,
+ IN CONST CHAR16 *s2,
+ IN UINTN len);
+CHAR16 *StrDuplicate(IN CONST CHAR16 *Src);
+UINTN StrLen(IN CONST CHAR16 *s1);
+UINTN StrSize(IN CONST CHAR16 *s1);
+VOID StrCat(IN CHAR16 *Dest, IN CONST CHAR16 *Src);
+CHAR16 *DevicePathToStr(EFI_DEVICE_PATH *DevPath);
+
+#define CompareGuid(a, b) memcmp(a, b, sizeof(a))
+
 extern int debug;
 #ifdef dprint
 #undef dprint