script/gen_fvp_linux_yaml.sh: increase lava-test-interactive

There are some test descriptions [4,5] which boots an OpenEmbedded generated
file system that takes more than 5 minutes to complete between the
init.sh execution and the command prompt, thus increase these value to avoid
LAVA to timeout.

[4] test_config:
    fvp-tspd-tsp-dram:fvp-linux.rootfs-dtb.1t-fip.uboot-aemv8a-tspd-debug
    https://tf.validation.linaro.org/scheduler/job/361645

[5] test_config:
    fvp-rst-bl31:fvp-linux.rootfs+rst31-dtb.1t-fip.uboot-aemv8a.rst31-debug
    https://tf.validation.linaro.org/scheduler/job/361644

Signed-off-by: Leonardo Sandoval <leonardo.sandoval@linaro.org>
Change-Id: I2586320e70dc89da82d1b66a68138cc319cd28b7
1 file changed