[PATCH -next] samples: watch_queue: depends on HEADERS_INSTALL

[Randy Dunlap]

From: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>

Building samples/watch_queue/ uses installed headers, so make it
depends on HEADERS_INSTALL to prevent a build error.

../samples/watch_queue/watch_test.c:23:10: fatal error: linux/watch_queue.h: No such file or directory

Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: David Howells <dhowells@xxxxxxxxxx>
---
 samples/Kconfig |    1 +
 1 file changed, 1 insertion(+)

--- linux-next-20191010.orig/samples/Kconfig
+++ linux-next-20191010/samples/Kconfig
@@ -171,6 +171,7 @@ config SAMPLE_VFS
 
 config SAMPLE_WATCH_QUEUE
 	bool "Build example /dev/watch_queue notification consumer"
+	depends on HEADERS_INSTALL
 	help
 	  Build example userspace program to use the new mount_notify(),
 	  sb_notify() syscalls and the KEYCTL_WATCH_KEY keyctl() function.