Fix minor issues with makefiles

makefile.in

@@ -1,6 +1,6 @@
 # makefile for Gambit system.
 
-# Copyright (c) 1994-2017 by Marc Feeley, All Rights Reserved.
+# Copyright (c) 1994-2018 by Marc Feeley, All Rights Reserved.
 
 PACKAGE_SHORTNAME = @PACKAGE_SHORTNAME@
 PACKAGE_NAME = @PACKAGE_NAME@
@@ -181,7 +181,7 @@ bench: fake_target all
 examples: fake_target all
 	@cd examples && $(MAKE) $(MDEFINES) $@
 
-prebuilt:  dist dist-devel
+prebuilt: dist dist-devel
 	PATH="gsi:$$PATH" prebuilt/remote-connect $(BUILD_FARM) "" "(define tmpdir \"gambtmp0\")(define gambit-dist \"$(PACKAGE_TARNAME)\")(define timeout 3000)(ssh timeout (string-append \"rm -rf \" tmpdir \";mkdir \" tmpdir \";echo \\\"logged in on:\\\";hostname\"))(scp-to timeout (string-append gambit-dist \".tgz\") (string-append tmpdir \"/.\"))(ssh timeout (string-append \"ssh $(BUILD_HOST) \\\"cd \" tmpdir \";tar zxf \" gambit-dist \".tgz;cd \" gambit-dist \";./configure;make -j 4;mv ../\" gambit-dist \".tgz .;cd prebuilt;make prebuilt\\\"\"))(scp-from timeout (string-append tmpdir \"/\" gambit-dist \"/$(PACKAGE_TARNAME)-*\") \".\")"
 	@# cd prebuilt && $(MAKE) $(MDEFINES) $@
 

misc/makefile.in

@@ -1,6 +1,6 @@
 # makefile for Gambit miscellanea.
 
-# Copyright (c) 1994-2015 by Marc Feeley, All Rights Reserved.
+# Copyright (c) 1994-2018 by Marc Feeley, All Rights Reserved.
 
 herefromroot = misc
 rootfromhere = ..
@@ -68,7 +68,7 @@ mandir = @mandir@
 
 .SUFFIXES:
 
-RCFILES = makefile.in README bench.tgz simple-make-project.tgz \
+RCFILES = makefile.in README simple-make-project.tgz \
 openwatcom.bat vcexpress.bat vctoolkit.bat vc2008.bat vstudio.zip \
 proj_msc.zip conf_msc conf_msc.sed conf_mpp.sed \
 proj_wat.zip conf_wat conf_wat.sed conf_wpp.sed conf_win.sed \