Cirrus CI: Fix Ubuntu rolling job

.cirrus.yml

@@ -207,8 +207,6 @@ environment:
 
 task:
   name: Ubuntu rolling x64 shared-libs-only gdmd
-  # allow failures - gdb v10 came with regressions
-  allow_failures: true
   container:
     image: ubuntu:rolling
     cpu: 8
@@ -217,12 +215,10 @@ task:
   environment:
     CI_ARCH: x86_64
     CI_OS: linux
-    EXTRA_APT_PACKAGES: "gdmd llvm-dev libclang-common-15-dev"
+    EXTRA_APT_PACKAGES: "gdmd llvm-dev libclang-common-19-dev"
     EXTRA_CMAKE_FLAGS: "-DBUILD_SHARED_LIBS=ON -DBUILD_LTO_LIBS=ON -DD_COMPILER=gdmd -DLDC_LINK_MANUALLY=ON"
     PARALLELISM: 8
     PATH: ${CIRRUS_WORKING_DIR}/../cmake/bin:${CIRRUS_WORKING_DIR}/../ninja:${PATH}
-    # for gdmd:
-    LANG: C.UTF-8
   << : *INSTALL_UBUNTU_PREREQUISITES_TEMPLATE
   << : *COMMON_STEPS_TEMPLATE