Makefile.package.in: use "" for MESSAGE arguments

Otherwise we get output like:

>>> host-pkg-config 0.25 'Installing to host directory'

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/Makefile.package.in

@@ -292,21 +292,21 @@ $(BUILD_DIR)/%/.stamp_built::
 
 # Install to host dir
 $(BUILD_DIR)/%/.stamp_host_installed:
-	@$(call MESSAGE,'Installing to host directory')
+	@$(call MESSAGE,"Installing to host directory")
 	$($(PKG)_INSTALL_CMDS)
 	$(foreach hook,$($(PKG)_POST_INSTALL_HOOKS),$(call $(hook))$(sep))
 	$(Q)touch $@
 
 # Install to staging dir
 $(BUILD_DIR)/%/.stamp_staging_installed:
-	@$(call MESSAGE,'Installing to staging directory')
+	@$(call MESSAGE,"Installing to staging directory")
 	$($(PKG)_INSTALL_STAGING_CMDS)
 	$(foreach hook,$($(PKG)_POST_INSTALL_STAGING_HOOKS),$(call $(hook))$(sep))
 	$(Q)touch $@
 
 # Install to images dir
 $(BUILD_DIR)/%/.stamp_images_installed:
-	@$(call MESSAGE,'Installing to images directory')
+	@$(call MESSAGE,"Installing to images directory")
 	$($(PKG)_INSTALL_IMAGES_CMDS)
 	$(foreach hook,$($(PKG)_POST_INSTALL_IMAGES_HOOKS),$(call $(hook))$(sep))
 	$(Q)touch $@