Summary: * Enhance Linaro crosstool-ng.

Details: 1. Work with Bero to release 4.8 binary build. 2. Update Linaro crosstool-ng to use ISL/CLooG for 4.8 build (lp:1172595). 3. Rebase conditional compare experimental codes to lp:gcc-linaro/4.8.

Plan: * Investigate the impact of conditional compare on optimizations.

Planned leaves: * 29 April - 1 May: Labor Day's holiday.

Best Regards! -Zhenqiang