Revert "release script: Download fbc sources tarball instead of doing "git clone""

This reverts commit 3fc7d3a. The problem
is that line endings are all LF even in the .zip download from Github.
But we want CRLF line endings in the dos/win32 packages, so we have to
do a git checkout manually.

Conflicts:
	contrib/release/build.sh

Author: dkl

contrib/release/build.sh

@@ -7,8 +7,8 @@
 #   - Downloaded archives are cached in the input/ dir
 #   - Output packages & manifests are put in the output/ dir
 #   - Toolchain source packages are downloaded too
-#   - fbc sources are retrieved from Git; you can specify the exact commit to
-#     build, the default is "master".
+#   - fbc sources are retrieved from Git; you have to specify the exact commit
+#     to build (or a tag/branch name).
 #
 # The standalone fbc is built in the same directory as the normal fbc, by just
 # rebuilding src/compiler/obj/fbc.o (that's all that's affected by
@@ -79,6 +79,19 @@ mkdir -p input
 mkdir -p output
 rm -rf build
 mkdir build
+
+echo "updating input/fbc repo"
+cd input
+if [ ! -d fbc ]; then
+	git clone https://github.com/freebasic/fbc.git
+fi
+cd fbc
+git fetch
+git fetch --tags
+git remote prune origin
+git reset --hard origin/master
+cd ../..
+
 cd build
 
 buildinfo=../output/buildinfo-$target.txt
@@ -208,13 +221,6 @@ win64)
 	;;
 esac
 
-get_fbc_sources() {
-	# fbc sources
-	download fbc-$fbccommit.tar.gz https://github.com/freebasic/fbc/archive/$fbccommit.tar.gz
-	tar xf ../input/fbc-$fbccommit.tar.gz
-	mv fbc-$fbccommit fbc
-}
-
 bootfb_title=FreeBASIC-1.02.1-$fbtarget
 
 case $fbtarget in
@@ -227,7 +233,9 @@ linux*)
 	download $bootfb_package "https://downloads.sourceforge.net/fbc/${bootfb_package}?download"
 	tar xf ../input/$bootfb_package
 
-	get_fbc_sources
+	# fbc sources
+	cp -R ../input/fbc .
+	cd fbc && git reset --hard "$fbccommit" && cd ..
 
 	mkdir tempinstall
 	;;
@@ -237,7 +245,9 @@ linux*)
 	download $bootfb_package "https://downloads.sourceforge.net/fbc/${bootfb_package}?download"
 	unzip -q ../input/$bootfb_package
 
-	get_fbc_sources
+	# fbc sources
+	cp -R ../input/fbc fbc
+	cd fbc && git reset --hard "$fbccommit" && cd ..
 	echo "prefix := `pwd -W`" > fbc/config.mk
 
 	# On 64bit, we have to override the FB makefile's uname check, because MSYS uname reports 32bit still