select docker with xstroke so xstroke has a place to live

package/xstroke/Config.in

@@ -1,5 +1,6 @@
 config BR2_PACKAGE_XSTROKE
 	bool "xstroke"
+	select BR2_PACKAGE_DOCKER
 	default n
 	help
 	  Handwriting recognition for X

package/xstroke/xstroke.mk

@@ -11,7 +11,7 @@ XSTROKE_INSTALL_STAGING = NO
 XSTROKE_INSTALL_TARGET = YES
 XSTROKE_INSTALL_TARGET_OPT = DESTDIR=$(TARGET_DIR) install
 
-XSTROKE_DEPENDENCIES = uclibc docker
+XSTROKE_DEPENDENCIES = uclibc 
 
 $(eval $(call AUTOTARGETS,package,xstroke))