alsa-lib: fix missing dependencies

Also align with upstream alsa-lib

alsa-lib/Makefile

@@ -16,7 +16,7 @@ PKG_SOURCE_URL:=ftp://ftp.alsa-project.org/pub/lib/ \
 		http://alsa.cybermirror.org/lib/
 PKG_MD5SUM:=7cc05f25e1d5b65da8fb3fdcd540f226
 
-PKG_FIXUP:=libtool
+PKG_FIXUP:=autoreconf
 PKG_INSTALL:=1
 
 include $(INCLUDE_DIR)/package.mk
@@ -32,7 +32,7 @@ define Package/alsa-lib
   CATEGORY:=Libraries
   TITLE:=ALSA (Advanced Linux Sound Architecture) library
   URL:=http://www.alsa-project.org/
-  DEPENDS:=@AUDIO_SUPPORT
+  DEPENDS:=@AUDIO_SUPPORT +libpthread +librt
 endef
 
 define Package/alsa-lib/description
@@ -44,7 +44,7 @@ TARGET_CFLAGS += $(FPIC)
 
 define Build/Configure
 	$(call Build/Configure/Default, \
-	    --enable-static \
+		--enable-static \
 		--disable-python \
 		--disable-debug \
 		--without-debug \