remove arch-prefix from binary filename

package/sylpheed/sylpheed.mk

@@ -12,7 +12,7 @@ SYLPHEED_INSTALL_TARGET = YES
 SYLPHEED_INSTALL_TARGET_OPT = DESTDIR=$(TARGET_DIR) install
 
 SYLPHEED_CONF_ENV = PKG_CONFIG_PATH=$(STAGING_DIR)/usr/lib/pkgconfig
-SYLPHEED_CONF_OPT = --disable-gtkspell
+SYLPHEED_CONF_OPT = --disable-gtkspell --program-prefix=""
 
 SYLPHEED_DEPENDENCIES = uclibc