perf_counter tools: add help texts

Add Documentation/perf-stat.txt and Documentation/perf-top.txt.

The template that was used for it: Documentation/git-add.txt from Git.

Fix up small bugs to make these help texts show up both in the 'perf'
common-command summary output screen, and on the individual help screens.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/Documentation/perf_counter/generate-cmdlist.sh b/Documentation/perf_counter/generate-cmdlist.sh
index 75c68d9..f06f6fd 100755
--- a/Documentation/perf_counter/generate-cmdlist.sh
+++ b/Documentation/perf_counter/generate-cmdlist.sh
@@ -9,16 +9,16 @@
 
 static struct cmdname_help common_cmds[] = {"
 
-sed -n -e 's/^git-\([^ 	]*\)[ 	].* common.*/\1/p' command-list.txt |
+sed -n -e 's/^perf-\([^ 	]*\)[ 	].* common.*/\1/p' command-list.txt |
 sort |
 while read cmd
 do
      sed -n '
-     /^NAME/,/git-'"$cmd"'/H
+     /^NAME/,/perf-'"$cmd"'/H
      ${
             x
-            s/.*git-'"$cmd"' - \(.*\)/  {"'"$cmd"'", "\1"},/
+            s/.*perf-'"$cmd"' - \(.*\)/  {"'"$cmd"'", "\1"},/
 	    p
-     }' "Documentation/git-$cmd.txt"
+     }' "Documentation/perf-$cmd.txt"
 done
 echo "};"