Remove linux_chromium_compile_dbg_32_ng from the CQ.
Remove linux_chromium_compile_dbg_32_ng from the CQ.

We need to reconfigure the system images for the 32-bit
Linux desktop bots (to change them to build on a normal
64-bit ubuntu image against a sysroot), so we will
temporarily remove them from the CQ while that's
happening.

TBR=jam@chromium.org, phajdan.jr@chromium.org
BUG=590004

Review URL: https://codereview.chromium.org/1877963004

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#386545}

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk