package/rsh-redone: don't override dependencies

Don't override RSH_REDONE_DEPENDENCIES in a conditional

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit d5253000213b77e265cbf88c56c1d6a1fd9d3aa2)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/rsh-redone/rsh-redone.mk

@@ -21,7 +21,7 @@ RSH_REDONE_MAKE_FLAGS = \
 	BIN="$(RSH_REDONE_BINS-y)" SBIN="$(RSH_REDONE_SBINS-y)"
 
 ifneq ($(BR2_PACKAGE_RSH_REDONE_RSHD)$(BR2_PACKAGE_RSH_REDONE_RLOGIND),)
-RSH_REDONE_DEPENDENCIES = linux-pam
+RSH_REDONE_DEPENDENCIES += linux-pam
 endif
 
 define RSH_REDONE_BUILD_CMDS