Fix invalid .o SRCS from r314527.

MFC after:	1 week
Sponsored by:	Dell EMC Isilon

secure/lib/libssh/Makefile

@@ -13,7 +13,7 @@ SRCS+=	authfd.c authfile.c bufaux.c bufbn.c bufec.c buffer.c \
 	compat.c crc32.c deattack.c fatal.c hostfile.c \
 	log.c match.c md-sha256.c moduli.c nchan.c packet.c opacket.c \
 	readpass.c rsa.c ttymodes.c xmalloc.c addrmatch.c \
-	atomicio.c key.c dispatch.c mac.c uidswap.c uuencode.c misc.c utf8.o \
+	atomicio.c key.c dispatch.c mac.c uidswap.c uuencode.c misc.c utf8.c \
 	monitor_fdpass.c rijndael.c ssh-dss.c ssh-ecdsa.c ssh-rsa.c dh.c \
 	msg.c progressmeter.c dns.c entropy.c umac.c umac128.c \
 	ssh-pkcs11.c smult_curve25519_ref.c \
@@ -23,7 +23,7 @@ SRCS+=	authfd.c authfile.c bufaux.c bufbn.c bufec.c buffer.c \
 	kex.c kexdh.c kexgex.c kexecdh.c kexc25519.c \
 	kexdhc.c kexgexc.c kexecdhc.c kexc25519c.c \
 	kexdhs.c kexgexs.c kexecdhs.c kexc25519s.c \
-	platform-pledge.c platform-tracing.o
+	platform-pledge.c platform-tracing.c
 PACKAGE=	ssh
 
 # gss-genr.c should be in $SRCS but causes linking problems, so it is