[MSWin] Get rid of single quotes in sed command lines

GnuWin32 sed strips only double quotes, but not single quotes, and
dies:

```
sed: -e expression #1, char 1: unknown command: `''
```

Author: nobu

common.mk

@@ -1222,7 +1222,7 @@ $(REVISION_H): revision.tmp
 $(srcdir)/ext/ripper/ripper.c: $(srcdir)/ext/ripper/tools/preproc.rb $(srcdir)/parse.y $(srcdir)/defs/id.def $(srcdir)/ext/ripper/depend
 	$(ECHO) generating $@
 	$(Q) $(CHDIR) $(@D) && \
-	sed -e 's/{\$$([^(){}]*)[^{}]*}//g' -e /AUTOGENERATED/q depend | \
+	sed -e "s/{\$$([^(){}]*)[^{}]*}//g" -e /AUTOGENERATED/q depend | \
 	$(exec) $(MAKE) -f - $(mflags) \
 		Q=$(Q) ECHO=$(ECHO) RM="$(RM1)" BISON=$(YACC) top_srcdir=../.. srcdir=. VPATH=../.. \
 		RUBY="$(BASERUBY)" PATH_SEPARATOR="$(PATH_SEPARATOR)" LANG=C
@@ -1241,27 +1241,27 @@ $(srcdir)/ext/rbconfig/sizeof/sizes.c: $(srcdir)/ext/rbconfig/sizeof/depend \
 		$(tooldir)/generic_erb.rb $(srcdir)/template/sizes.c.tmpl $(srcdir)/configure.ac
 	$(ECHO) generating $@
 	$(Q) $(CHDIR) $(@D) && \
-	sed '/AUTOGENERATED/q' depend | \
+	sed /AUTOGENERATED/q depend | \
 	$(exec) $(MAKE) -f - $(mflags) \
 		Q=$(Q) ECHO=$(ECHO) top_srcdir=../../.. srcdir=. VPATH=../../.. RUBY="$(BASERUBY)" $(@F)
 
 $(srcdir)/ext/rbconfig/sizeof/limits.c: $(srcdir)/ext/rbconfig/sizeof/depend \
 		$(tooldir)/generic_erb.rb $(srcdir)/template/limits.c.tmpl
 	$(ECHO) generating $@
 	$(Q) $(CHDIR) $(@D) && \
-	sed '/AUTOGENERATED/q' depend | \
+	sed /AUTOGENERATED/q depend | \
 	$(exec) $(MAKE) -f - $(mflags) \
 		Q=$(Q) ECHO=$(ECHO) top_srcdir=../../.. srcdir=. VPATH=../../.. RUBY="$(BASERUBY)" $(@F)
 
 $(srcdir)/ext/socket/constdefs.c: $(srcdir)/ext/socket/depend
 	$(Q) $(CHDIR) $(@D) && \
-	sed '/AUTOGENERATED/q' depend | \
+	sed /AUTOGENERATED/q depend | \
 	$(exec) $(MAKE) -f - $(mflags) \
 		Q=$(Q) ECHO=$(ECHO) top_srcdir=../.. srcdir=. VPATH=../.. RUBY="$(BASERUBY)"
 
 $(srcdir)/ext/etc/constdefs.h: $(srcdir)/ext/etc/depend
 	$(Q) $(CHDIR) $(@D) && \
-	sed '/AUTOGENERATED/q' depend | \
+	sed /AUTOGENERATED/q depend | \
 	$(exec) $(MAKE) -f - $(mflags) \
 		Q=$(Q) ECHO=$(ECHO) top_srcdir=../.. srcdir=. VPATH=../.. RUBY="$(BASERUBY)"