Build

Refactor cmake scripts and support LTO (#232) #2239

Job	Run time
docker-builds (mingw64, docker/libddwaf/gcc/mingw64/Dockerfile, libddwaf-linux-mingw64)	2m 33s
linux-musl-build (aarch64, aarch64, arm64, linux/arm64, libddwaf-aarch64-linux-musl)	8m 58s
macos-build	5m 10s
linux-musl-build (x86_64, x86_64, amd64, linux/amd64, libddwaf-x86_64-linux-musl)	6m 44s
linux-musl-build (i386, i386, i386, linux/386, libddwaf-i386-linux-musl)	6m 36s
linux-musl-build (armv7, armv7, arm, linux/arm/v7, libddwaf-armv7-linux-musl)	9m 8s
macos-cross-build	1m 37s
windows-builds (Win32)	7m 32s
windows-builds (x64)	9m 47s
macos-universal-package	41s
package-nuget	25s
release	0s
	59m 11s

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