Remove some $(TOP)s that cause problems on Windows (as they contain ':')

docs/users_guide/ghc.mk

@@ -23,7 +23,7 @@ $(eval $(call docbook,docs/users_guide,users_guide))
 # tree.  This is a horrible hack, but I can't find a better way to do
 # it --SDM (2009-05-11)
 
-build_ug_book = $(TOP)/docs/users_guide/ug-book.xml
+build_ug_book = docs/users_guide/ug-book.xml
 src_ug_book  = $(dir $(realpath $(dir $(build_ug_book))/ug-book.xml.in))ug-book.xml
 
 ifneq "$(build_ug_book)" "$(src_ug_book)"

utils/ghc-cabal/ghc.mk

@@ -54,7 +54,7 @@ $(GHC_CABAL_DIR)_dist-dummy-ghc_MODULES = dummy-ghc
 $(GHC_CABAL_DIR)_dist-dummy-ghc_PROG    = dummy-ghc$(exeext)
 
 # depend on config.mk, so we pick up the new version number if it changes.
-$(GHC_CABAL_DIR)/dist-dummy-ghc/build/dummy-ghc.hs : $(GHC_CABAL_DIR)/ghc.mk $(MKDIRHIER) $(TOP)/mk/config.mk
+$(GHC_CABAL_DIR)/dist-dummy-ghc/build/dummy-ghc.hs : $(GHC_CABAL_DIR)/ghc.mk $(MKDIRHIER) mk/config.mk
 	$(MKDIRHIER) $(dir $@)
 	echo "import System.Environment; import System.Cmd; import System.Exit" >$@
 	echo "main = do args <- getArgs; if args == [\"--numeric-version\"] then putStrLn \"$(ProjectVersion)\" else do e <- rawSystem \"$(GHC_STAGE0)\" args; exitWith e" >>$@