Bump buidlroot version to 2018.02.6

bsp/buildroot/package/postgresql/Config.in

@@ -19,4 +19,5 @@ config BR2_PACKAGE_POSTGRESQL
 	  http://www.postgresql.org
 
 comment "postgresql needs a toolchain w/ dynamic library"
+	depends on BR2_USE_MMU
 	depends on BR2_STATIC_LIBS

bsp/buildroot/package/postgresql/postgresql.hash

@@ -1,4 +1,5 @@
-# From https://ftp.postgresql.org/pub/source/v9.6.8/postgresql-9.6.8.tar.bz2.sha256
-sha256 eafdb3b912e9ec34bdd28b651d00226a6253ba65036cb9a41cad2d9e82e3eb70  postgresql-9.6.8.tar.bz2
+# From https://ftp.postgresql.org/pub/source/v10.5/postgresql-10.5.tar.bz2.sha256
+sha256	6c8e616c91a45142b85c0aeb1f29ebba4a361309e86469e0fb4617b6a73c4011	postgresql-10.5.tar.bz2
+
 # License file, Locally calculated
-sha256 24cfc70cf16b3a23242c49ffce39510683bdd48cbedb8a46fe03976ee5f5c21e  COPYRIGHT
+sha256	24cfc70cf16b3a23242c49ffce39510683bdd48cbedb8a46fe03976ee5f5c21e	COPYRIGHT

bsp/buildroot/package/postgresql/postgresql.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-POSTGRESQL_VERSION = 9.6.8
+POSTGRESQL_VERSION = 10.5
 POSTGRESQL_SOURCE = postgresql-$(POSTGRESQL_VERSION).tar.bz2
 POSTGRESQL_SITE = http://ftp.postgresql.org/pub/source/v$(POSTGRESQL_VERSION)
 POSTGRESQL_LICENSE = PostgreSQL
@@ -56,6 +56,11 @@ endif
 ifeq ($(BR2_PACKAGE_OPENSSL),y)
 POSTGRESQL_DEPENDENCIES += openssl
 POSTGRESQL_CONF_OPTS += --with-openssl
+else
+# PostgreSQL checks for /dev/urandom and fails if it's being cross-compiled and
+# an SSL library isn't found. Since /dev/urandom is guaranteed to be provided
+# on Linux systems, explicitly tell the configure script it's available.
+POSTGRESQL_CONF_ENV += ac_cv_file__dev_urandom=yes
 endif
 
 ifeq ($(BR2_PACKAGE_OPENLDAP),y)