Bump nuget subversion for new build

Makefile

@@ -5,7 +5,7 @@ LIBICONV_VERSION  = 1.17
 # version of the gettext-tools-windows package; usually same as GETTEXT_VERSION
 # use "-n" suffix; for NuGet, use ".n" suffix instead, e.g. 0.20.1-1 and 0.20.1.1
 PACKAGE_VERSION   = $(GETTEXT_VERSION)
-NUGET_VERSION     = $(GETTEXT_VERSION)
+NUGET_VERSION     = $(GETTEXT_VERSION).0.1
 
 # Awful trickery to undo MSYS's magical path conversion (see
 # http://www.mingw.org/wiki/Posix_path_conversion) which happens to break
@@ -138,7 +138,7 @@ archive: dist
 
 $(NUGET_FILE): Gettext.Tools.nuspec dist
 	rm -f $@
-	$(NUGET) pack Gettext.Tools.nuspec -OutputDirectory $(BUILDDIR)
+	$(NUGET) pack Gettext.Tools.nuspec -Version $(NUGET_VERSION) -OutputDirectory $(BUILDDIR)
 
 nuget: $(NUGET_FILE)