speedo: "make clean-gnupg" may not remove the source.

* build-aux/speedo.mk (clean-$(1)): Take care of gnupg.
--

I learned it the hard way and lost a bunch of stashed changes.

build-aux/speedo.mk

@@ -735,7 +735,11 @@ clean-$(1):
 	 (cd "$$$${pkgbdir}" 2>/dev/null &&		  \
 	  $(MAKE) --no-print-directory                    \
            $$$${pkgmkargs_inst} uninstall V=0 ) || true  ;\
-	 rm -fR "$$$${pkgsdir}" "$$$${pkgbdir}" || true)
+         if [ "$(1)" = "gnupg" ]; then                    \
+	   rm -fR "$$$${pkgbdir}" || true                ;\
+	 else                                             \
+	   rm -fR "$$$${pkgsdir}" "$$$${pkgbdir}" || true;\
+	 fi)
 	-rm -f $(stampdir)/stamp-final-$(1) $(stampdir)/stamp-$(1)-*