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>
diff --git a/package/vim/vim.mk b/package/vim/vim.mk
index 4e273d4..cb08cd9 100644
--- a/package/vim/vim.mk
+++ b/package/vim/vim.mk
@@ -42,10 +42,9 @@
 
 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))