bench-all: get working again

Fix gem5/build wrong path for dd swapfile. Put it under out/ while we are at it
now that we have out of tree builds.

Allow seq_id larger than 7: broke previously because 08 is not valid octal.

Use timeout --foreground to allow killing scons

Don't upload results by default, too insane.

.gitignore

@@ -7,6 +7,7 @@ gitignore*
 
 # Specific files.
 /data
+/gem5/out
 /images-*.zip
 /out
 /out.*