Fixed cve_rules folder name according to latest Yara-Rule repo structure

[sunilrebel]

to: @airbnb/binaryalert-maintainers
cc:
size: small|medium|large
resolves #

Background

Yara rules were not fetched from the defined folder because the repo structure changed and folder were renamed.

Changes

• fixed the folder name according to current structure

Testing

Tested on my local system. Screenshot attached.

[coveralls]

Coverage remained the same at 90.52% when pulling 8f2bbb0 on sunilrebel:master into a9c0f06 on airbnb:master.

[sunilrebel]

What I have to do to increase the coverage? It is a folder name change which is used while cloning rules

[jdheyburn]

Any chance this can get merged? New builds of the project are missing out on these yara rules.