Add GEA3 & GEA4 ciphers

Corresponding test code include both official test vectors from the
specs and data from over-the-air tests.

This obsoletes libosmo-crypt-a53 as it was last missing piece
unimplemented in libosmogsm.

Change-Id: I939e4f6b91b4a7c591ef3761fe2d46ed1c2fb2d3
Related: OS#1582
diff --git a/include/osmocom/crypt/gprs_cipher.h b/include/osmocom/crypt/gprs_cipher.h
index d242595..c302f10 100644
--- a/include/osmocom/crypt/gprs_cipher.h
+++ b/include/osmocom/crypt/gprs_cipher.h
@@ -3,6 +3,8 @@
 #include <osmocom/core/linuxlist.h>
 #include <osmocom/core/utils.h>
 
+#include <stdint.h>
+
 #define GSM0464_CIPH_MAX_BLOCK	1523
 
 /* 3GPP TS 24.008 § 10.5.5.3 */