Support task tracer #1600

Job	Run time
gcc-compile-with-bazel	16m 51s
gcc-compile-with-bazel-all-options	18m 22s
gcc-compile-with-boringssl	18m 33s
gcc-compile-with-cmake	3m 16s
gcc-compile-with-cmake-all-options	5m 17s
gcc-compile-with-make	2m 47s
gcc-compile-with-make-all-options	5m 2s
clang-compile-with-bazel	15m 50s
clang-compile-with-bazel-all-options	16m 27s
clang-compile-with-boringssl	16m 53s
clang-compile-with-cmake	2m 46s
clang-compile-with-cmake-all-options	5m 14s
clang-compile-with-make	3m 13s
clang-compile-with-make-all-options	4m 55s
clang-unittest	16m 7s
	2h 31m 33s

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