Remove dependency on tr(1) for MinGW builds on Win32

This leaves things slightly (more) broken for MinGW builds on Cygwin,
but that doesn't currently quite work in other respects and isn't
documented anyway.  See:

http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2005-03/msg00751.html

p4raw-id: //depot/perl@24131

pod/perl592delta.pod

@@ -308,10 +308,6 @@ upgrades.
 F<t/io/dup.t>, F<t/io/open.t> and F<lib/ExtUtils/t/Constant.t> fail some
 tests on some BSD flavours.
 
-perl fails to compile on Win32 with MinGW, if you don't have the Cygwin
-tools installed, because the makefile currently relies on the presence of
-tr(1).
-
 =head1 Plans for the next release
 
 The current plan for perl 5.9.3 is to add CPANPLUS as a core module.

win32/makefile.mk

@@ -1082,7 +1082,7 @@ $(PERLDLL): perldll.def $(PERLDLL_OBJ) $(PERLDLL_RES) Extensions_static
 .ELIF "$(CCTYPE)" == "GCC"
 	$(LINK32) -mdll -o $@ -Wl,--base-file -Wl,perl.base $(BLINK_FLAGS) \
 	    $(mktmp $(LKPRE) $(PERLDLL_OBJ:s,\,$B,) \
-	        $(shell $(MINIPERL) -I..\lib buildext.pl --list-static-libs|tr \\\\ /) \
+	        $(shell $(MINIPERL) -I..\lib buildext.pl --list-static-libs) \
 	        $(LIBFILES) $(LKPOST))
 	dlltool --output-lib $(PERLIMPLIB) \
 		--dllname $(PERLDLL:b).dll \
@@ -1091,7 +1091,7 @@ $(PERLDLL): perldll.def $(PERLDLL_OBJ) $(PERLDLL_RES) Extensions_static
 		--output-exp perl.exp
 	$(LINK32) -mdll -o $@ $(BLINK_FLAGS) \
 	    $(mktmp $(LKPRE) $(PERLDLL_OBJ:s,\,$B,) \
-	        $(shell $(MINIPERL) -I..\lib buildext.pl --list-static-libs|tr \\\\ /) \
+	        $(shell $(MINIPERL) -I..\lib buildext.pl --list-static-libs) \
 	        $(LIBFILES) perl.exp $(LKPOST))
 .ELSE
 	$(LINK32) -dll -def:perldll.def -out:$@ \