OvmfPkg/PlatformCI: Add CI coverage for RiscVVirtQemu

Add support for building RiscVVirtQemu platform in CI.

Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>

OvmfPkg/PlatformCI/.azurepipelines/Ubuntu-GCC5.yml

@@ -174,6 +174,15 @@ jobs:
             Run.Flags: "QEMU_SKIP=TRUE"
             Run: $(should_run)
 
+          QEMU_RISCV64_DEBUG:
+            Build.File: "$(package)/PlatformCI/QemuBuild.py"
+            Build.Arch: "RISCV64"
+            Build.Flags: ""
+            Build.Target: "DEBUG"
+            # this build is for RISC-V qemu virt not qemu-kvm
+            Run.Flags: "QEMU_SKIP=TRUE"
+            Run: $(should_run)
+
     workspace:
       clean: all