DragonFlyBSD/src 40f0590. Makefile.inc1, etc/mtree BSD.include.dist BSD.usr.dist

gcc80: Hook into the buildworld as optional compiler.

This alternative compiler can be activated by WORLD_ALTCOMPILER variable.
It will not be built by default.
DeltaFile
+76-0etc/mtree/BSD.include.dist
+28-0etc/mtree/BSD.usr.dist
+23-0Makefile.inc1
+4-0gnu/usr.bin/Makefile
+3-0gnu/lib/Makefile
+2-0share/mk/bsd.cpu.mk
+1-0share/mk/Makefile
+1-0share/mk/bsd.README
+138-08 files

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