Avoid adding duplicates to SRCS/OBJS/SOBJS/POBJS

This is a change in preparation for stopping to use lorder.sh (D26044) and
instead assume that we have a linker newer than ~1990. Without lorder.sh
duplicates end up being passed to the linker when building .so files and this
can result in duplicate symbol definition errors.

There is one minor change: libcompiler_rt.a will no longer provide
gcc_personality_v0 and instead we now only have it in libgcc_eh.a/libgcc_s.so.
This matches GCC's behaviour.

Reviewed By:	emaste, cem
Differential Revision: https://reviews.freebsd.org/D26042

lib/libcompiler_rt/Makefile.inc

@@ -67,7 +67,6 @@ SRCF+=		floatunsisf
 SRCF+=		floatuntidf
 SRCF+=		floatuntisf
 SRCF+=		floatuntixf
-SRCF+=		gcc_personality_v0	# not in upstream
 SRCF+=		int_util
 SRCF+=		lshrdi3
 SRCF+=		lshrti3

lib/libgcc_eh/Makefile

@@ -8,6 +8,7 @@ NO_PIC=
 MK_SSP=		no
 WARNS?=	2
 
+SRCS_EXC+=	int_util.c
 .include "Makefile.inc"
 
 .if ${.MAKE.LEVEL} > 0

lib/libgcc_eh/Makefile.inc

@@ -9,7 +9,6 @@ STATIC_CFLAGS+=${PICFLAG} -fvisibility=hidden -DVISIBILITY_HIDDEN
 .PATH: ${COMPILERRTDIR}/lib/builtins
 .PATH: ${UNWINDSRCDIR}
 SRCS_EXC+=	gcc_personality_v0.c
-SRCS_EXC+=	int_util.c
 SRCS_EXC+=	Unwind-EHABI.cpp
 SRCS_EXC+=	Unwind-sjlj.c
 SRCS_EXC+=	UnwindLevel1-gcc-ext.c

lib/libprocstat/Makefile

@@ -59,8 +59,6 @@ MLINKS+=libprocstat.3 procstat_close.3 \
 CFLAGS+=	-DLIBPROCSTAT_ZFS
 SRCS+=	zfs.c
 OBJS+=	zfs/zfs_defs.o
-SOBJS+=	zfs/zfs_defs.pico
-POBJS+=	zfs/zfs_defs.po
 SUBDIR=	zfs
 zfs/zfs_defs.o: .PHONY
 	@cd ${.CURDIR}/zfs && ${MAKE} zfs_defs.o

stand/userboot/userboot/Makefile

@@ -20,7 +20,6 @@ SRCS+=		bootinfo.c
 SRCS+=		bootinfo32.c
 SRCS+=		bootinfo64.c
 SRCS+=		conf.c
-SRCS+=		console.c
 SRCS+=		copy.c
 SRCS+=		devicename.c
 SRCS+=		elf32_freebsd.c