Double quotes on fs.py --command-line argument break the dot file generation

[cirosantilli2]

E.g. fs.py --command-line= "- lkmc_eval="bTUgZXhpdA==".

Does not happen in fs_bigLITTLE.py.

Error message:

warn: failed to generate dot output from gem5/default/0/m5out/config.dot

Global frequency set at 1000000000000 ticks per second
['dot', '-Tsvg', '/tmp/user/20321/tmpFpov23'] return code: 1

stdout, stderr:
 
Error: /tmp/user/20321/tmpFpov23: syntax error in line 17 near '='