* gnu/packages/flex.scm (flex): Update to 2.6.2. [native-inputs]: Add help2man. [origin]: Update uri to github. Remove CVE-2016-6354 patch. (flex-2.6.1): Remove variable. * gnu/packages/patches/flex-CVE-2016-6354.patch: Delete file. * gnu/local.mk (dist_patch_DATA): Update. * gnu/packages/kde-frameworks.scm (solid, kservice)[native-inputs]: Use flex.