Added EXTRA_DIST to doc makefile.am so make dist would include powertop.8
diff --git a/doc/Makefile.am b/doc/Makefile.am
index c5f5d7e..3fa3770 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -1 +1,2 @@
 man_MANS = powertop.8
+EXTRA_DIST = powertop.8