libgrpc: use new termux_git_clone_src function

packages/libgrpc/build.sh

@@ -1,6 +1,7 @@
 TERMUX_PKG_HOMEPAGE=https://grpc.io/
 TERMUX_PKG_DESCRIPTION="High performance, open source, general RPC framework that puts mobile and HTTP/2 first"
 TERMUX_PKG_LICENSE="Apache-2.0"
+TERMUX_PKG_SRCURL=https://github.com/grpc/grpc.git
 TERMUX_PKG_VERSION=1.29.1
 TERMUX_PKG_REVISION=3
 TERMUX_PKG_DEPENDS="libc++, openssl, protobuf, c-ares, zlib"
@@ -24,26 +25,7 @@ TERMUX_PKG_EXTRA_CONFIGURE_ARGS="
 -DProtobuf_PROTOC_LIBRARY=$TERMUX_PREFIX/lib/libprotoc.so
 "
 
-termux_step_extract_package() {
-	local CHECKED_OUT_FOLDER=$TERMUX_PKG_CACHEDIR/checkout-$TERMUX_PKG_VERSION
-	if [ ! -d $CHECKED_OUT_FOLDER ]; then
-		local TMP_CHECKOUT=$TERMUX_PKG_TMPDIR/tmp-checkout
-		rm -Rf $TMP_CHECKOUT
-		mkdir -p $TMP_CHECKOUT
-
-		git clone --depth 1 \
-			--branch v$TERMUX_PKG_VERSION \
-			https://github.com/grpc/grpc.git \
-			$TMP_CHECKOUT
-		cd $TMP_CHECKOUT
-		git submodule update --init # --depth 1
-		mv $TMP_CHECKOUT $CHECKED_OUT_FOLDER
-	fi
-
-	mkdir $TERMUX_PKG_SRCDIR
-	cd $TERMUX_PKG_SRCDIR
-	cp -Rf $CHECKED_OUT_FOLDER/* .
-
+termux_step_post_get_source() {
 	termux_setup_protobuf
 }