package xerces: remove missing mirror and use primary download site

src/xerces.mk

@@ -6,8 +6,7 @@ $(PKG)_IGNORE   :=
 $(PKG)_CHECKSUM := 177ec838c5119df57ec77eddec9a29f7e754c8b2
 $(PKG)_SUBDIR   := xerces-c-$($(PKG)_VERSION)
 $(PKG)_FILE     := xerces-c-$($(PKG)_VERSION).tar.gz
-$(PKG)_URL      := http://apache.linux-mirror.org/xerces/c/$(word 1,$(subst ., ,$($(PKG)_VERSION)))/sources/$($(PKG)_FILE)
-$(PKG)_URL_2    := http://www.apache.org/dist/xerces/c/$(word 1,$(subst ., ,$($(PKG)_VERSION)))/sources/$($(PKG)_FILE)
+$(PKG)_URL      := http://www.apache.org/dist/xerces/c/$(word 1,$(subst ., ,$($(PKG)_VERSION)))/sources/$($(PKG)_FILE)
 $(PKG)_DEPS     := gcc libiconv curl pthreads
 
 define $(PKG)_UPDATE