ci: Allow EfiLoaderData code execution in AArch64 build

ArmVirt.dsc.inc sets PcdDxeNxMemoryProtectionPolicy to 0x...7FD5
which marks EfiLoaderData as non-executable. GRUB loads its modules
into EfiLoaderData allocations and executes code from them, causing
an instruction abort (permission fault, second level) on AArch64.

Override the PCD to 0x...7FD1 (clears the EfiLoaderData NX bit) as
documented in ArmVirt.dsc.inc itself for GRUB compatibility.

Signed-off-by: Saravanan D <saravanand@crusoe.ai>

Author: saravan2

.github/workflows/release.yaml

@@ -52,7 +52,8 @@ jobs:
           source edksetup.sh
           make -C BaseTools
           export GCC5_AARCH64_PREFIX=aarch64-linux-gnu-
-          build -p ArmVirtPkg/ArmVirtCloudHv.dsc -a AARCH64 -t GCC5 -b DEBUG
+          build -p ArmVirtPkg/ArmVirtCloudHv.dsc -a AARCH64 -t GCC5 -b DEBUG \
+            --pcd gEfiMdeModulePkgTokenSpaceGuid.PcdDxeNxMemoryProtectionPolicy=0xC000000000007FD1
       - name: Upload AArch64 artifact
         if: github.event_name == 'create' && github.event.ref_type == 'tag'
         uses: actions/upload-artifact@v4