bugfix: make gmake verbose during the biuld #74

Job	Run time
list-ports	7s
Build ports (1st run) / convert	1s
Build ports (1st run) / build (devel/riscv32-esp-elf)	5h 33m 19s
Build ports (1st run) / build (devel/esp-llvm-embedded-toolchain-libs-clang)	3h 44m 38s
Build ports (1st run) / build (devel/mkfatfs)	8m 47s
Build ports (1st run) / build (devel/xtensa-esp32s3-elf-legacy)	3h 19m 0s
Build ports (1st run) / build (devel/xtensa-esp32s2-elf-legacy)	3h 13m 15s
Build ports (1st run) / build (devel/xtensa-esp32-elf-legacy)	2h 8m 57s
Build ports (1st run) / build (devel/esp-llvm-embedded-toolchain)	4h 58m 6s
Build ports (1st run) / build (devel/binutils-esp32ulp)	10m 56s
Build ports (1st run) / build (devel/espflash)	27m 25s
Build ports (1st run) / build (devel/esp-gdb-riscv32)	13m 6s
Build ports (1st run) / build (devel/xtensa-esp-elf)	1h 5m 44s
Build ports (1st run) / build (devel/esp-gdb-xtensa)	12m 28s
Build ports (1st run) / build (devel/binutils-esp32s2ulp)	11m 36s
Build ports (1st run) / build (lang/rust-esp-src)	3h 53m 50s
Build ports (1st run) / build (lang/rust-esp)	6h 0m 1s
Build ports (1st run) / conclude-result	0s
	1d 11h 21m 16s

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