leak-detective: Whitelist some Botan functions

Due to the mangled C++ function names it's tricky to be more specific.  The
"leaked" allocations are from a static hashtable containing EC groups.

There is another leak caused by the locking allocator singleton
(triggered by the first function that uses it, usually initialization of
 a cipher, but could be a hasher in other test runners), but we can avoid
that with a Botan config option.

src/libstrongswan/utils/leak_detective.c

@@ -609,6 +609,11 @@ static char *whitelist[] = {
 	/* FHH IMCs and IMVs */
 	"TNC_IMC_NotifyConnectionChange",
 	"TNC_IMV_NotifyConnectionChange",
+	/* Botan */
+	"botan_public_key_load",
+	"botan_privkey_create_ecdsa",
+	"botan_privkey_create_ecdh",
+	"botan_privkey_load_ecdh",
 };
 
 /**