Add df comments to make-adopt-build-farm.sh #3214

Job	Run time
macOS (macOS, jdk8u, macos-11, temurin)	39m 31s
Linux (linux, jdk8u, temurin, adoptopenjdk/centos7_build_image)	16m 28s
macOS (macOS, jdk11u, macos-13, temurin)	45m 43s
Linux (linux, jdk11u, temurin, adoptopenjdk/centos7_build_image)	35m 20s
Linux (linux, jdk17u, temurin, adoptopenjdk/centos7_build_image)	30m 44s
Linux (linux, jdk, temurin, adoptopenjdk/centos7_build_image)	35m 37s
Windows (windows-2022, jdk8u, temurin)	30m 42s
Windows (windows-2022, jdk11u, temurin)	59m 36s
Linux (alpine-linux, jdk8u, temurin, adoptopenjdk/alpine3_build_image)	18m 51s
Windows (windows-2022, jdk17u, temurin)	1h 15m 48s
Linux (alpine-linux, jdk11u, temurin, adoptopenjdk/alpine3_build_image)	41m 47s
Linux (alpine-linux, jdk17u, temurin, adoptopenjdk/alpine3_build_image)	38m 42s
Windows (windows-2022, jdk, temurin)	1h 2m 13s
Linux (alpine-linux, jdk, temurin, adoptopenjdk/alpine3_build_image)	47m 4s
Linux (linux, jdk11u, dragonwell, adoptopenjdk/centos7_build_image)	27m 54s
Linux (linux, jdk11u, fast_startup, adoptopenjdk/centos7_build_image)	30m 14s
Linux (linux, jdk11u, bisheng, adoptopenjdk/centos7_build_image)	32m 7s
	11h 8m 21s

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