picocom: Update to 3.1

Switched to new upstream.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

utils/picocom/patches/010-fix-compile.patch

@@ -0,0 +1,12 @@
+diff --git a/Makefile b/Makefile
+index d6a4d60..a07d801 100644
+--- a/Makefile
++++ b/Makefile
+@@ -51,7 +51,6 @@ linenoise-1.0/linenoise.o : linenoise-1.0/linenoise.c linenoise-1.0/linenoise.h
+ 
+ OBJS += picocom.o term.o fdio.o split.o termios2.o custbaud_bsd.o
+ picocom : $(OBJS)
+-	$(LD) $(LDFLAGS) -o $@ $(OBJS) $(LDLIBS)
+ 
+ picocom.o : picocom.c term.h fdio.h split.h custbaud.h
+ term.o : term.c term.h termios2.h custbaud_bsd.h custbaud.h