Protect against spaces in build directory name when extracting .PL files

Author: doughera88

Makefile.SH

@@ -965,7 +965,7 @@ lib/re.pm: ext/re/re.pm
 
 $(plextract):	miniperl$(EXE_EXT) $(CONFIGPM) x2p/s2p
 	@-rm -f $@
-	$(LDLIBPTH) $(RUN) ./miniperl$(EXE_EXT) -I`pwd`/lib [email protected]
+	$(LDLIBPTH) $(RUN) ./miniperl$(EXE_EXT) -I"`pwd`/lib" [email protected]
 
 x2p/s2p: miniperl$(EXE_EXT) $(CONFIGPM) x2p/s2p.PL
 	cd x2p; $(LDLIBPTH) $(MAKE) s2p