Fix build with nettle 3.7.2

PR:		254355
Submitted by:	mandree

net/libstorj/files/patch-src_crypto.c

+--- src/crypto.c.orig	2018-05-10 18:45:47 UTC
++++ src/crypto.c
+@@ -216,7 +216,7 @@ int sha512_of_str(const uint8_t *str, int str_len, uin
+     return 0;
+ }
+ 
+-void pbkdf2_hmac_sha512 (
++void off_pbkdf2_hmac_sha512 (
+     unsigned key_length,
+     const uint8_t *key,
+     unsigned iterations,

net/libstorj/files/patch-src_crypto.h

+--- src/crypto.h.orig	2018-05-10 18:45:47 UTC
++++ src/crypto.h
+@@ -40,7 +40,7 @@ int double_ripemd160sha256(uint8_t *data, uint64_t dat
+ int double_ripemd160sha256_as_string(uint8_t *data, uint64_t data_size,
+                                     char **digest);
+ 
+-void pbkdf2_hmac_sha512(unsigned key_length,
++void off_pbkdf2_hmac_sha512(unsigned key_length,
+                         const uint8_t *key,
+                         unsigned iterations,
+                         unsigned salt_length, const uint8_t *salt,