Updating default.xml

Change-Id: If927b223a07d51d39a5d06e49085408dc3e220c7

Author: seL4-ci

default.xml

@@ -31,7 +31,7 @@
   <project name="picotcp.git" path="projects/picotcp" remote="picotcp" revision="13c00a067190f5ec62340ed932a2bb833c366d63" upstream="refs/tags/v1.7.0" dest-branch="refs/tags/v1.7.0"/>
   <project name="polly" path="tools/polly" remote="polly" revision="ef7e79c2c297d456f2742fd0b976f555d058d4e0" upstream="master" dest-branch="master"/>
   <project name="projects_libs.git" path="projects/projects_libs" revision="250ebdc6a1b74ddb12f99eee34c2b41570fe0afa" upstream="master" dest-branch="master"/>
-  <project name="seL4.git" path="kernel" revision="e45d229601e9a0a13329528c4b4bf5b99fe1be87" upstream="master" dest-branch="master"/>
+  <project name="seL4.git" path="kernel" revision="8b298285dccdab79a0e0cf456a0a1fb9be50b555" upstream="master" dest-branch="master"/>
   <project name="seL4_libs" path="projects/seL4_libs" revision="d3d24dd818f99bd244d4def322818637d9a1d0cb" upstream="master" dest-branch="master"/>
   <project name="seL4_projects_libs.git" path="projects/seL4_projects_libs" revision="97360824eebc80e9a68fef9ef699f3c0ff8bd792" upstream="master" dest-branch="master"/>
   <project name="seL4_tools.git" path="tools/seL4" revision="bef85f32a4829c5062fd6c808c7cab57b816cd9f" upstream="master" dest-branch="master">