NetBSD re-synchronization of the source tree

This brings our tree to NetBSD 7.0, as found on -current on the
10-10-2015.

This updates:
 - LLVM to 3.6.1
 - GCC to GCC 5.1
 - Replace minix/commands/zdump with usr.bin/zdump
 - external/bsd/libelf has moved to /external/bsd/elftoolchain/
 - Import ctwm
 - Drop sprintf from libminc

Change-Id: I149836ac18e9326be9353958bab9b266efb056f0

tests/lib/libc/stdlib/Makefile

@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.23 2012/04/04 10:52:59 joerg Exp $
+# $NetBSD: Makefile,v 1.25 2015/05/01 14:17:56 christos Exp $
 
 .include <bsd.own.mk>
 
@@ -18,6 +18,7 @@ TESTS_C+=	t_mi_vector_hash
 TESTS_C+=	t_random
 TESTS_C+=	t_strtod
 TESTS_C+=	t_strtol
+TESTS_C+=	t_strtoi
 TESTS_C+=	t_system
 
 TESTS_SH+=	t_atexit
@@ -30,7 +31,14 @@ BINDIR=		${TESTSDIR}
 PROGS+=		h_atexit
 PROGS+=		h_getopt h_getopt_long
 
+.if ${MACHINE_CPU} == "aarch64" || ${MACHINE_CPU} == "arm" \
+    || ${MACHINE_ARCH} == "sparc" || ${MACHINE_ARCH} == "sparc64" \
+    || ${MACHINE_ARCH} == "i386" || ${MACHINE_ARCH} == "x86_64"
+CPPFLAGS.t_strtod.c+=	-DHAVE_FENV
+.endif
+
 LDADD.t_strtod=			-lm
+DPADD.t_strtod+=		${LIBM}
 
 LDADD.t_getenv_thread=		-lpthread