[fmm] Updated fmm.C to make sure output file 'times' is not write-protected
[fmm] Updated fmm.C to make sure output file 'times' is not write-protected

mit-carbon/Graphite,nkawahara/Graphite,8l/Graphite,mit-carbon/Graphite-Cycle-Level,nkawahara/Graphite,mit-carbon/Graphite,victorisildur/Graphite,mit-carbon/Graphite,8l/Graphite,fhijaz/Graphite,victorisildur/Graphite,victorisildur/Graphite,mit-carbon/Graphite-Cycle-Level,8l/Graphite,nkawahara/Graphite,fhijaz/Graphite,victorisildur/Graphite,fhijaz/Graphite,mit-carbon/Graphite-Cycle-Level,8l/Graphite,mit-carbon/Graphite-Cycle-Level,fhijaz/Graphite,mit-carbon/Graphite,nkawahara/Graphite