Update millbuild config for foreign module support #889

Job	Run time
jtag-dtm-test (freechips.rocketchip.system.WithJtagDTMSystem_freechips.rocketchip.system.DefaultC...	10m 21s
riscv-arch-test	0s
jtag-dtm-test (freechips.rocketchip.system.WithJtagDTMSystem_freechips.rocketchip.system.DefaultR...	10m 41s
riscv-tests (DefaultConfig)	10m 17s
jtag-dtm-test (freechips.rocketchip.system.WithJtagDTMSystem_freechips.rocketchip.system.WithDebu...	10m 33s
emulator (DefaultSmallConfig)	10m 25s
riscv-tests (DefaultBufferlessConfig)	10m 22s
jtag-dtm-test (freechips.rocketchip.system.WithJtagDTMSystem_freechips.rocketchip.system.WithDebu...	10m 26s
emulator (DualBankConfig)	10m 13s
riscv-tests (DefaultRV32Config)	10m 22s
emulator (DualChannelConfig)	10m 14s
riscv-tests (TinyConfig)	10m 18s
emulator (DualChannelDualBankConfig)	10m 26s
riscv-tests (DefaultFP16Config)	10m 17s
emulator (RoccExampleConfig)	10m 15s
emulator (Edge128BitConfig)	10m 28s
emulator (Edge32BitConfig)	10m 25s
emulator (QuadChannelBenchmarkConfig)	10m 24s
emulator (EightChannelConfig)	10m 25s
emulator (DualCoreConfig)	10m 7s
emulator (MemPortOnlyConfig)	10m 11s
emulator (MMIOPortOnlyConfig)	10m 25s
emulator (CloneTileConfig)	10m 24s
emulator (HypervisorConfig)	10m 24s
	3h 58m 23s

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