Plug ubsan_minimal into gnu/lib/libclang_rt build

ok jca@

gnu/lib/libclang_rt/Makefile

@@ -1,7 +1,8 @@
-# $OpenBSD: Makefile,v 1.1 2021/09/28 08:35:06 fcambus Exp $
+# $OpenBSD: Makefile,v 1.2 2022/02/16 03:49:40 gnezdo Exp $
 
 .include <bsd.own.mk>
 
 SUBDIR+=profile
+SUBDIR+=ubsan_minimal
 
 .include <bsd.subdir.mk>

gnu/lib/libclang_rt/ubsan_minimal/Makefile

@@ -0,0 +1,35 @@
+# $OpenBSD: Makefile,v 1.1 2022/02/16 03:49:40 gnezdo Exp $
+
+.include <bsd.own.mk>
+
+LLVM_V=		13.0.0
+LIBDIR=		/usr/lib/clang/${LLVM_V}/lib
+
+.if ${COMPILER_VERSION:L} != "clang"
+CC=		clang
+CXX=		clang++
+.endif
+
+.if ${BUILD_CLANG:L} == "yes"
+
+LIB=	clang_rt.ubsan_minimal
+NOPIC=
+NOPROFILE=
+
+CFLAGS+=	-fPIC
+CPPFLAGS+=	-I${BSDSRCDIR}/gnu/llvm/compiler-rt/lib
+
+.PATH: ${.CURDIR}/../../../llvm/compiler-rt/lib/ubsan_minimal
+
+SRCS+=		ubsan_minimal_handlers.cpp
+
+beforeinstall:
+	${INSTALL} -d -o ${BINOWN} -g ${BINGRP} -m ${DIRMODE} \
+		${DESTDIR}${LIBDIR}
+
+.include <bsd.lib.mk>
+
+.else
+NOPROG=
+.include <bsd.prog.mk>
+.endif