Revert "Unlink FriendDecl from linked list in CXXRecordDecl."
Revert "Unlink FriendDecl from linked list in CXXRecordDecl."

This reverts commit a3f7f117f917e901701d48f03157ff580b67b779.

beniz/root,zzxuanyuan/root-compressor-dummy,buuck/root,simonpf/root,beniz/root,simonpf/root,BerserkerTroll/root,BerserkerTroll/root,simonpf/root,abhinavmoudgil95/root,olifre/root,root-mirror/root,davidlt/root,mhuwiler/rootauto,gganis/root,abhinavmoudgil95/root,gganis/root,zzxuanyuan/root,abhinavmoudgil95/root,satyarth934/root,karies/root,simonpf/root,agarciamontoro/root,karies/root,satyarth934/root,zzxuanyuan/root,olifre/root,zzxuanyuan/root-compressor-dummy,mhuwiler/rootauto,zzxuanyuan/root,agarciamontoro/root,gganis/root,satyarth934/root,agarciamontoro/root,buuck/root,agarciamontoro/root,davidlt/root,mhuwiler/rootauto,satyarth934/root,karies/root,karies/root,davidlt/root,zzxuanyuan/root-compressor-dummy,simonpf/root,olifre/root,zzxuanyuan/root,mhuwiler/rootauto,beniz/root,abhinavmoudgil95/root,bbockelm/root,bbockelm/root,zzxuanyuan/root-compressor-dummy,abhinavmoudgil95/root,abhinavmoudgil95/root,root-mirror/root,bbockelm/root,bbockelm/root,davidlt/root,karies/root,davidlt/root,satyarth934/root,beniz/root,simonpf/root,satyarth934/root,zzxuanyuan/root-compressor-dummy,beniz/root,zzxuanyuan/root-compressor-dummy,davidlt/root,abhinavmoudgil95/root,karies/root,agarciamontoro/root,zzxuanyuan/root,root-mirror/root,olifre/root,karies/root,gganis/root,davidlt/root,olifre/root,agarciamontoro/root,BerserkerTroll/root,satyarth934/root,zzxuanyuan/root-compressor-dummy,olifre/root,root-mirror/root,beniz/root,simonpf/root,buuck/root,simonpf/root,agarciamontoro/root,satyarth934/root,BerserkerTroll/root,bbockelm/root,beniz/root,mhuwiler/rootauto,buuck/root,bbockelm/root,zzxuanyuan/root,olifre/root,gganis/root,BerserkerTroll/root,agarciamontoro/root,zzxuanyuan/root-compressor-dummy,buuck/root,zzxuanyuan/root,root-mirror/root,agarciamontoro/root,davidlt/root,BerserkerTroll/root,BerserkerTroll/root,gganis/root,bbockelm/root,olifre/root,mhuwiler/rootauto,satyarth934/root,zzxuanyuan/root,zzxuanyuan/root,simonpf/root,simonpf/root,gganis/root,olifre/root,root-mirror/root,buuck/root,buuck/root,zzxuanyuan/root,bbockelm/root,root-mirror/root,bbockelm/root,satyarth934/root,BerserkerTroll/root,olifre/root,buuck/root,mhuwiler/rootauto,agarciamontoro/root,gganis/root,zzxuanyuan/root-compressor-dummy,buuck/root,abhinavmoudgil95/root,karies/root,root-mirror/root,buuck/root,beniz/root,zzxuanyuan/root,beniz/root,karies/root,root-mirror/root,BerserkerTroll/root,bbockelm/root,davidlt/root,zzxuanyuan/root-compressor-dummy,gganis/root,davidlt/root,karies/root,beniz/root,abhinavmoudgil95/root,bbockelm/root,abhinavmoudgil95/root,gganis/root,root-mirror/root,davidlt/root,BerserkerTroll/root,BerserkerTroll/root,zzxuanyuan/root-compressor-dummy,mhuwiler/rootauto,beniz/root,karies/root,mhuwiler/rootauto,satyarth934/root,buuck/root,abhinavmoudgil95/root,gganis/root,simonpf/root,agarciamontoro/root,olifre/root,mhuwiler/rootauto,root-mirror/root,mhuwiler/rootauto,zzxuanyuan/root