vim: Docs are only available when BR2_PACKAGE_VIM_RUNTIME is selected

Fixes
http://autobuild.buildroot.net/results/adc3e2f876f83a4011574e03bceb0007d7e891a2/build-end.log

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/vim/vim.mk

@@ -42,10 +42,9 @@ endef
 
 ifeq ($(BR2_PACKAGE_VIM_RUNTIME),y)
 VIM_POST_INSTALL_TARGET_HOOKS += VIM_INSTALL_RUNTIME_CMDS
-endif
-
 ifneq ($(BR2_HAVE_DOCUMENTATION),y)
 VIM_POST_INSTALL_TARGET_HOOKS += VIM_REMOVE_DOCS
 endif
+endif
 
 $(eval $(autotools-package))