btrfs-progs: makefile: add clean-all to the usage

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/Makefile.in b/Makefile.in
index 7e65efb..6febd94 100644 (file)
--- a/Makefile.in
+++ b/Makefile.in
@@ -6,6 +6,7 @@
 #   test        run the full testsuite
 #   install     install to default location (/usr/local)
 #   clean       clean built binaries (not the documentation)
+#   clean-all   clean as above, clean docs and generated files
 #
 # Tuning by variables (environment or make arguments):
 #   V=1            verbose, print command lines (default: quiet)