package/fuse-overlayfs: needs headers >= 3.15

fuse-overlayfs unconditionally uses SYS_renameat2 since version 0.2 and
https://github.com/containers/fuse-overlayfs/commit/616119093a5d37bf201a7b7970eeb5f7ba32de22
which is not available until kernel 3.15 and
https://github.com/torvalds/linux/commit/5fb6b953bb7aa86a9c8ea760934982cedc45c52b

Fixes:
 - http://autobuild.buildroot.org/results/3c97e25c69ab949e51f04b5d0134bc4b4059982d

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/fuse-overlayfs/Config.in

@@ -3,6 +3,7 @@ config BR2_PACKAGE_FUSE_OVERLAYFS
 	depends on BR2_USE_MMU # libfuse3
 	depends on !BR2_STATIC_LIBS # libfuse3
 	depends on BR2_TOOLCHAIN_HAS_THREADS # libfuse3
+	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_15
 	select BR2_PACKAGE_LIBFUSE3
 	help
 	  FUSE-overlayfs is an implementation of overlay+shiftfs in
@@ -10,6 +11,7 @@ config BR2_PACKAGE_FUSE_OVERLAYFS
 
 	  http://github.com/containers/fuse-overlayfs
 
-comment "fuse-overlayfs needs a toolchain w/ threads, dynamic library"
+comment "fuse-overlayfs needs a toolchain w/ threads, dynamic library, headers >= 3.15"
 	depends on BR2_USE_MMU
-	depends on !BR2_TOOLCHAIN_HAS_THREADS || BR2_STATIC_LIBS
+	depends on !BR2_TOOLCHAIN_HAS_THREADS || BR2_STATIC_LIBS || \
+		!BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_15