Bump buildroot to 2019.02

bsp/buildroot/package/bash/bash.hash

@@ -1,4 +1,4 @@
 # Locally calculated after checking pgp signature from
-# http://ftp.gnu.org/gnu/bash/bash-4.4.12.tar.gz.sig
-sha256 57d8432be54541531a496fd4904fdc08c12542f43605a9202594fa5d5f9f2331	bash-4.4.12.tar.gz
+# http://ftp.gnu.org/gnu/bash/bash-4.4.18.tar.gz.sig
+sha256 604d9eec5e4ed5fd2180ee44dd756ddca92e0b6aa4217bbab2b6227380317f23	bash-4.4.18.tar.gz
 sha256 8ceb4b9ee5adedde47b31e975c1d90c73ad27b6b165a1dcd80c7c545eb65b903	COPYING

bsp/buildroot/package/bash/bash.mk

@@ -4,11 +4,9 @@
 #
 ################################################################################
 
-BASH_VERSION = 4.4.12
+BASH_VERSION = 4.4.18
 BASH_SITE = $(BR2_GNU_MIRROR)/bash
-# Build after since bash is better than busybox shells
-BASH_DEPENDENCIES = ncurses readline host-bison \
-	$(if $(BR2_PACKAGE_BUSYBOX),busybox)
+BASH_DEPENDENCIES = ncurses readline host-bison
 BASH_CONF_OPTS = --with-installed-readline --without-bash-malloc
 BASH_LICENSE = GPL-3.0+
 BASH_LICENSE_FILES = COPYING
@@ -45,4 +43,12 @@ define BASH_INSTALL_TARGET_CMDS
 	rm -f $(TARGET_DIR)/bin/bashbug
 endef
 
+# Add /bin/bash to /etc/shells otherwise some login tools like dropbear
+# can reject the user connection. See man shells.
+define BASH_ADD_MKSH_TO_SHELLS
+	grep -qsE '^/bin/bash$$' $(TARGET_DIR)/etc/shells \
+		|| echo "/bin/bash" >> $(TARGET_DIR)/etc/shells
+endef
+BASH_TARGET_FINALIZE_HOOKS += BASH_ADD_MKSH_TO_SHELLS
+
 $(eval $(autotools-package))