shairplay: use generic autoreconf fixup

Use the generic autoreconf facility to pickup proper variants of
autoconf, automake and libtool.

Remove the unneeded Build/Configure override.

Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>

sound/shairplay/Makefile

@@ -23,7 +23,7 @@ PKG_LICENSE_FILES:=LICENSE
 
 include $(INCLUDE_DIR)/package.mk
 
-PKG_FIXUP:=libtool
+PKG_FIXUP:=autoreconf
 
 define Package/shairplay
   SECTION:=sound
@@ -32,12 +32,6 @@ define Package/shairplay
   TITLE:=Shairplay
 endef
 
-define Build/Configure
-	(cd $(PKG_BUILD_DIR)/$(CONFIGURE_PATH); \
-	./autogen.sh;)
-	$(call Build/Configure/Default)
-endef
-
 define Package/shairplay/description
   Free portable AirPlay server implementation similar to ShairPort.
 endef