Move variable to set bash_completion.d to Paths.mk

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: Ian Jackson <ian.jackson@eu.citrix.com>
Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: Wei Liu <wei.liu2@citrix.com>

Config.mk

@@ -58,8 +58,6 @@ endif
 include $(XEN_ROOT)/config/$(XEN_OS).mk
 include $(XEN_ROOT)/config/$(XEN_TARGET_ARCH).mk
 
-BASH_COMPLETION_DIR ?= $(CONFIG_DIR)/bash_completion.d
-
 # arguments: variable, common path part, path to test, if yes, if no
 define setvar_dir
   ifndef $(1)

config/Paths.mk.in

@@ -50,6 +50,7 @@ XEN_LIB_STORED           := @XEN_LIB_STORED@
 
 CONFIG_DIR               := @CONFIG_DIR@
 INITD_DIR                := @INITD_DIR@
+BASH_COMPLETION_DIR      := $(CONFIG_DIR)/bash_completion.d
 XEN_LOCK_DIR             := @XEN_LOCK_DIR@
 XEN_PAGING_DIR           := @XEN_PAGING_DIR@