xfsprogs: note musl incompatibility reason

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
diff --git a/package/xfsprogs/Config.in b/package/xfsprogs/Config.in
index 9f0d250..fb603ad 100644
--- a/package/xfsprogs/Config.in
+++ b/package/xfsprogs/Config.in
@@ -5,7 +5,7 @@
 config BR2_PACKAGE_XFSPROGS
 	bool "xfsprogs"
 	depends on BR2_USE_MMU # fork()
-	depends on !BR2_TOOLCHAIN_USES_MUSL
+	depends on !BR2_TOOLCHAIN_USES_MUSL # missing __[u]int*_t
 	depends on BR2_TOOLCHAIN_HAS_THREADS
 	select BR2_PACKAGE_UTIL_LINUX
 	select BR2_PACKAGE_UTIL_LINUX_LIBUUID