[PR-52] Build fails on RHEL 6.6.
Original issue is with: https://github.com/imagemin/gifsicle-bin/issues/36
 Tracking down the dependencies gifsicle is used by grunt-contrib-imagemin which  is used my ngmin which gives us app minification. So I just removed everything related to app minification.
Merge pull request #89 from rhq-project/rhel-6.x-build-error

[PR-52] Build fails on RHEL 6.6. Original issue is with: imagemin/gifsicle-bin#36
This is a GLIBC version error used by the native gifsicle package. Tracking down the dependencies gifsicle is used by grunt-contrib-imagemin which is used my ngmin which gives us app minification. So I just removed everything related to app minification.