config: pipeline: Update CONFIG_FRAME_WARN for i386

CONFIG_FRAME_WARN is set to 1024 by default for i386. The allowed value
for this is 0 to 8192. Let's increase it to 2048 to avoid getting the
warning when stack size is more than default 1024. As all warnings are
being treated as errors, our allmodconfig build fails.

Example of a build failure:
https://kcidb.kernelci.org/d/build/build?var-datasource=edquppk2ghfcwc&var-origin=maestro&var-build_architecture=$__all&var-build_config_name=$__all&var-id=maestro:6772ceda423acf18d263ca6b&var-test-path=boot&from=now-100y&to=now&timezone=browser&var-test_path=&var-issue_presence=yes

Related kernelci#870
Close kernelci/kernelci-project#482
Signed-off-by: Muhammad Usama Anjum <usama.anjum@collabora.com>

config/pipeline.yaml

@@ -1131,6 +1131,8 @@ jobs:
       defconfig:
         - i386_defconfig
         - allmodconfig
+      fragments:
+        - 'CONFIG_FRAME_WARN=2048'
     rules:
       tree:
       - 'mainline'