FreeBSD/ports ddf9ce8 (r496295)lang/gcc8-devel Makefile, lang/gcc8-devel/files patch-amd64-gcc-multilib-support

This commit brings multilib support for gcc on amd64. This means you can
compile and execute 32-bit binaries with gcc.
The gcc part will be upstreamed as soon as gcc trunk opens for new commits.
On the release front, gcc8, we will merge this commit after a week or so.

Approved by:    gerald@
DeltaFile
+73-0lang/gcc8-devel/files/patch-amd64-gcc-multilib-support
+73-0lang/gcc9-devel/files/patch-amd64-gcc-multilib-support
+3-1lang/gcc8-devel/Makefile
+3-1lang/gcc9-devel/Makefile
+152-24 files

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