8232639: Change module graph images to use SVG instead of PNG format.
Reviewed-by: mchung, ihse
/build/
/dist/
/.idea/
nbproject/private/
/webrev
/.src-rev
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.DS_Store
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test/nashorn/script/external
test/nashorn/lib
NashornProfile.txt
**/JTreport/**
**/JTwork/**