Configure Mend for GitHub.com #426

Job	Run time
Windows MSVC x64	1m 36s
Windows MSVC x86	1m 33s
Windows GCC	1m 57s
Windows Clang	3m 2s
Ubuntu GCC	38s
Ubuntu Clang	54s
Manylinux GCC	1m 36s
MUSL Cross Compile x86_64	50s
MUSL Cross Compile i686	1m 1s
MUSL Cross Compile aarch64	54s
MUSL Cross Compile armv7l	43s
MUSL Cross Compile armv6	52s
MUSL Cross Compile armv5l	56s
MUSL Cross Compile powerpc64	47s
MUSL Cross Compile powerpc64le	57s
	18m 16s

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