Update master_changes.md #1455

Job	Run time
Analyse	4s
Test-macOS (4.14.1)	56m 42s
Build-macOS (4.14.1)	3m 34s
Cygwin	2m 58s
Build-Linux (4.08.1)	1m 57s
Build-Linux (4.09.1)	1m 49s
Hygiene	17s
Build-Linux (4.10.2)	1m 45s
Build-Linux (4.11.2)	1m 58s
Build-Linux (4.12.1)	1m 52s
Build-Linux (4.13.1)	2m 1s
Build-Linux (5.0.0)	1m 57s
Build-Linux (5.1.0)	2m 0s
Build-Linux (4.14.1)	1m 43s
Build-Windows (x86_64-pc-cygwin, x86_64-pc-cygwin, 4.14.1)	43m 11s
Build-Windows (i686-w64-mingw32, x86_64-pc-cygwin, 4.14.1)	49m 48s
Build-Windows (x86_64-w64-mingw32, x86_64-pc-cygwin, 4.14.1)	47m 11s
Build-Windows (i686-pc-windows, x86_64-pc-cygwin, 4.14.1)	53m 39s
Build-Windows (x86_64-pc-windows, x86_64-pc-cygwin, 4.14.1)	49m 37s
Cold-Linux	5m 2s
Solvers-Linux (z3, 4.14.1)	17m 51s
Solvers-Linux (0install, 4.14.1)	1m 21s
Upgrade-Linux (4.14.1)	1m 1s
Test-Linux (4.14.1)	14m 8s
Solvers-macOS (z3, 4.14.1)	42m 20s
Solvers-macOS (0install, 4.14.1)	2m 13s
Upgrade-macOS (4.14.1)	2m 50s
	6h 50m 49s

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