package/skeleton: qstrip path before using it

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Maxime Hadjinlian <maxime.hadjinlian@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/skeleton/skeleton.mk

@@ -14,7 +14,7 @@ SKELETON_SOURCE =
 SKELETON_ADD_TOOLCHAIN_DEPENDENCY = NO
 
 ifeq ($(BR2_ROOTFS_SKELETON_CUSTOM),y)
-SKELETON_PATH = $(BR2_ROOTFS_SKELETON_CUSTOM_PATH)
+SKELETON_PATH = $(call qstrip,$(BR2_ROOTFS_SKELETON_CUSTOM_PATH))
 else
 SKELETON_PATH = system/skeleton
 endif