scrypt: new package

[Thomas:
  - move from "Libraries -> Crypto" to "System tools", since it only
    installs one binary, scrypt, and no library.
  - bump from 1.1.6 to 1.2.0
  - add comment in the .hash file explaining where the hash is coming
    from.
  - add missing dependency on OpenSSL
  - use BSD-2c as the license code, instead of BSD2
  - use 'main.c' as the license file.]

Signed-off-by: Parnell Springmeyer <parnell@digitalmentat.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/Config.in

@@ -754,6 +754,7 @@ menu "Crypto"
 	source "package/nettle/Config.in"
 	source "package/openssl/Config.in"
 	source "package/polarssl/Config.in"
+	source "package/scrypt/Config.in"
 endmenu
 
 menu "Database"

package/scrypt/Config.in

@@ -0,0 +1,8 @@
+config BR2_PACKAGE_SCRYPT
+	bool "scrypt"
+	help
+	  A password-based key derivation function specifically designed
+	  to make it costly to perform large-scale custom hardware attacks
+	  by requiring large amounts of memory.
+
+	  http://www.tarsnap.com/scrypt.html

package/scrypt/scrypt.hash

@@ -0,0 +1 @@
+sha256 dfd0d1a544439265bbb9b58043ad3c8ce50a3987b44a61b1d39fd7a3ed5b7fb8  scrypt-1.1.6.tgz

package/scrypt/scrypt.mk

@@ -0,0 +1,13 @@
+################################################################################
+#
+# scrypt
+#
+################################################################################
+
+SCRYPT_VERSION = 1.1.6
+SCRYPT_SOURCE = scrypt-$(SCRYPT_VERSION).tgz
+SCRYPT_SITE = http://www.tarsnap.com/scrypt
+SCRYPT_LICENSE = BSD2
+SCRYPT_INSTALL_STAGING = YES
+
+$(eval $(autotools-package))