aikgen generates AIK private/public key pairs

aikgen outputs a binary AIK private key blob and the AIK public key.
Optionally the Identity Request encrypted with the public key of
the Privacy CA can be output.

src/Makefile.am

@@ -119,3 +119,7 @@ endif
 if USE_INTEGRITY_TEST
   SUBDIRS += checksum
 endif
+
+if USE_AIKGEN
+  SUBDIRS += aikgen
+endif