[UR] UR Hardening

Pre-merge commit for: oneapi-src/unified-runtime#2090

sycl/cmake/modules/FetchUnifiedRuntime.cmake

@@ -116,14 +116,12 @@ if(SYCL_UR_USE_FETCH_CONTENT)
       CACHE PATH "Path to external '${name}' adapter source dir" FORCE)
   endfunction()
 
-  set(UNIFIED_RUNTIME_REPO "https://github.com/oneapi-src/unified-runtime.git")
-  # commit 897bcfb10a7e13b8e413278550e845322f6bd560 (HEAD, origin/main, origin/HEAD)
-  # Merge: 18514924 71cdf253
-  # Author: Omar Ahmed <[email protected]>
-  # Date:   Thu Sep 19 14:35:55 2024 +0100
-  #   Merge pull request #2022 from nrspruit/add_3_channel_image_support
-  #   [L0] Add 3-channel image support
-  set(UNIFIED_RUNTIME_TAG 897bcfb10a7e13b8e413278550e845322f6bd560)
+  set(UNIFIED_RUNTIME_REPO "https://github.com/RossBrunton/unified-runtime.git")
+  # commit put-commit-here
+  # Author: Ross Brunton <[email protected]>
+  # Date:   Fri Sep 13 15:38:40 2024 +0100
+  # Enable hardening flags on Linux
+  set(UNIFIED_RUNTIME_TAG 3ffd955d91521ba5deb0dea826a05c98eedae27b)
 
   set(UMF_BUILD_EXAMPLES OFF CACHE INTERNAL "EXAMPLES")
   # Due to the use of dependentloadflag and no installer for UMF and hwloc we need