libflac: switch to github for src tar

xiph.org is down

packages/libflac/build.sh

@@ -2,8 +2,8 @@ TERMUX_PKG_HOMEPAGE=https://xiph.org/flac/
 TERMUX_PKG_DESCRIPTION="FLAC (Free Lossless Audio Codec) library"
 TERMUX_PKG_LICENSE="GPL-2.0"
 TERMUX_PKG_VERSION=1.3.3
-TERMUX_PKG_SRCURL=http://downloads.xiph.org/releases/flac/flac-${TERMUX_PKG_VERSION}.tar.xz
-TERMUX_PKG_SHA256=213e82bd716c9de6db2f98bcadbc4c24c7e2efe8c75939a1a84e28539c4e1748
+TERMUX_PKG_SRCURL=https://github.com/xiph/flac/archive/${TERMUX_PKG_VERSION}.tar.gz
+TERMUX_PKG_SHA256=668cdeab898a7dd43cf84739f7e1f3ed6b35ece2ef9968a5c7079fe9adfe1689
 TERMUX_PKG_DEPENDS="libc++, libogg"
 TERMUX_PKG_BREAKS="libflac-dev"
 TERMUX_PKG_REPLACES="libflac-dev"