arm: use UPSTREAM_CHECK_COMMITS for git versioned recipes

Signed-off-by: Jon Mason <jon.mason@arm.com>

scripts/machine-summary.py

@@ -146,9 +146,11 @@ recipes = ("virtual/kernel",
            "edk2-firmware",
            "u-boot",
            "optee-os",
+           "optee-ftpm",
            "hafnium",
            "boot-wrapper-aarch64",
            "gator-daemon",
+           "gn",
            "opencsd",
            "gcc-aarch64-none-elf-native",
            "gcc-arm-none-eabi-native")