FreeBSD/ports dc38582 (r448067)lang/gcc7 Makefile

Fix PR 221571 more thoroughly and aligned with lang/gcc6 and lang/gcc5:
release tarballs, unlike snapshots, always contain prebuilt .info files.

PR:             221571
DeltaFile
+3-2lang/gcc7/Makefile
+3-21 files

UnifiedSplitRaw