gpsd: Support OS that lack cfmakeraw().

Fixes #79 and #80.

geography/gpsd/distinfo

@@ -1,6 +1,7 @@
-$NetBSD: distinfo,v 1.27 2021/01/09 19:42:42 gdt Exp $
+$NetBSD: distinfo,v 1.28 2021/03/23 10:49:44 jperkin Exp $
 
 SHA1 (gpsd-3.22.tar.gz) = 7e83fe4c1e978728cb9f35c2d7f5b234a707c82e
 RMD160 (gpsd-3.22.tar.gz) = 916829bad167ef8313ea348cfaac71201ab77cc1
 SHA512 (gpsd-3.22.tar.gz) = 4ed08e92b17f8f1bcef6be66f7bb232994d419d1638af0d435a5b03800dcde070accdecb707ea27cceebd333ab597fd0b3a77f405542b488626cb4f1efbe856b
 Size (gpsd-3.22.tar.gz) = 4758761 bytes
+SHA1 (patch-SConscript) = 9bd9491038a9ec4d805e2e540ab5b83e0c08d56f

geography/gpsd/patches/patch-SConscript

@@ -0,0 +1,15 @@
+$NetBSD: patch-SConscript,v 1.1 2021/03/23 10:49:44 jperkin Exp $
+
+gpspipe requires libgpsd for serial.c cfmakeraw() compat.
+
+--- SConscript.orig	2021-01-09 02:35:30.000000000 +0000
++++ SConscript
+@@ -1975,7 +1975,7 @@ gpsdctl = env.Program('clients/gpsdctl',
+                       LIBS=[libgps_static],
+                       parse_flags=gpsflags)
+ gpspipe = env.Program('clients/gpspipe', ['clients/gpspipe.c'],
+-                      LIBS=[libgps_static],
++                      LIBS=[libgpsd_static, libgps_static],
+                       parse_flags=gpsflags)
+ gpsrinex = env.Program('clients/gpsrinex', ['clients/gpsrinex.c'],
+                        LIBS=[libgps_static],