Build VM API and Linux tests for Raspberry Pi 4 too.

Change-Id: Ic6f5a5912947ab630ecef32100201c58e1516df2
diff --git a/BUILD.gn b/BUILD.gn
index e29a6f2..16be10e 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -33,8 +33,10 @@
     "//test/arch(:rpi4_clang)",
     "//test/linux(:aem_v8a_fvp_vm_clang)",
     "//test/linux(:qemu_aarch64_vm_clang)",
+    "//test/linux(:rpi4_vm_clang)",
     "//test/vmapi(:aem_v8a_fvp_vm_clang)",
     "//test/vmapi(:qemu_aarch64_vm_clang)",
+    "//test/vmapi(:rpi4_vm_clang)",
     "//test/vmapi/arch/aarch64/gicv3:gicv3_test(:aem_v8a_fvp_vm_clang)",
     "//test/vmapi/arch/aarch64/gicv3:gicv3_test(:qemu_aarch64_vm_clang)",
   ]