The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2016.08.20.01.03.34 mrg src/external/mit/xorg/server/xorg-server/Xext/Makefile,v 1.7 2016.08.20.01.03.34 mrg src/external/mit/xorg/server/xorg-server/hw/xfree86/dixmods/Makefile,v 1.13 2016.08.20.01.03.34 mrg src/external/mit/xorg/server/xorg-server/mi/Makefile,v 1.13 2016.08.20.01.04.48 mrg src/external/mit/xorg/server/xorg-server.old/mi/Makefile,v 1.2 2016.08.20.01.05.39 jakllsch src/distrib/sets/lists/base/shl.mi,v 1.782 2016.08.20.01.08.13 mrg src/distrib/sets/lists/xdebug/md.amd64,v 1.31 2016.08.20.01.08.13 mrg src/distrib/sets/lists/xdebug/md.i386,v 1.27 2016.08.20.01.08.13 mrg src/distrib/sets/lists/xserver/md.amd64,v 1.93 2016.08.20.01.08.13 mrg src/distrib/sets/lists/xserver/md.i386,v 1.110 2016.08.20.01.08.13 mrg src/external/mit/xorg/server/drivers/Makefile,v 1.80 Log files can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2016.08.html#2016.08.20.01.08.13