btrfs-progs: revert to 4.8.5

4.9 is broken, see #5416.

srcpkgs/btrfs-progs/template

@@ -1,7 +1,8 @@
 # Template file for 'btrfs-progs'
 pkgname=btrfs-progs
-version=4.9
-revision=1
+reverts=4.9_1
+version=4.8.5
+revision=2
 wrksrc=${pkgname}-v${version}
 build_style=gnu-configure
 configure_args="--disable-backtrace"
@@ -12,7 +13,7 @@ maintainer="Juan RP <xtraeme@voidlinux.eu>"
 license="GPL-2"
 homepage="http://btrfs.wiki.kernel.org/"
 distfiles="${KERNEL_SITE}/kernel/people/kdave/${pkgname}/${pkgname}-v${version}.tar.xz"
-checksum=e227baeb4652e83aab33135ec29b30339e2c99bba67d56fb589cd8a6b642c8a3
+checksum=d247b1c022aca5def3415bfa51e00c566cce36660a3ee517d4b6a1af911a08ef
 
 pre_configure() {
 	NOCONFIGURE=1 ./autogen.sh