feat(syncthing): fix build, update to 1.19.2

- removing vendor dir should not cause any problem unless, any
  dependencies of syncthing have been removed from there hosting site.
  (Highly unlikely)

Signed-off-by: Aditya Alok <dev.aditya.alok@gmail.com>

packages/syncthing/build.sh

@@ -4,43 +4,39 @@ TERMUX_PKG_LICENSE="MPL-2.0"
 TERMUX_PKG_MAINTAINER="@termux"
 # NOTE: as of 1.12.0 compilation fails when package zstd is
 # present in TERMUX_PREFIX.
-TERMUX_PKG_VERSION=1.19.1
+TERMUX_PKG_VERSION=1.19.2
 TERMUX_PKG_SRCURL=https://github.com/syncthing/syncthing/releases/download/v${TERMUX_PKG_VERSION}/syncthing-source-v${TERMUX_PKG_VERSION}.tar.gz
-TERMUX_PKG_SHA256=ffc5ec2f232314122a216884f63a48eea7c8739f9779e249be1f4776d7a55127
+TERMUX_PKG_SHA256=dcf93ef2fea1150b5b2e27d1c5e8e4853bd440b766a8355309af1607be08ce80
 TERMUX_PKG_AUTO_UPDATE=true
 
-termux_step_make(){
+termux_step_make() {
 	termux_setup_golang
 
 	# The build.sh script doesn't with our compiler
 	# so small adjustments to file locations are needed
 	# so the build.go is fine.
-	mkdir -p go/src/github.com/syncthing/syncthing
-	cp $TERMUX_PKG_SRCDIR/vendor/* ./go/src/ -r
-	cp $TERMUX_PKG_SRCDIR/*  go/src/github.com/syncthing/syncthing -r
+	mkdir -p go/src/github.com/syncthing
+	ln -sf "${TERMUX_PKG_SRCDIR}" go/src/github.com/syncthing/syncthing
 
 	# Set gopath so dependencies are built as in go get etc.
-	export GOPATH=$(pwd)/go
+	export GOPATH="$(pwd)/go"
 
 	cd go/src/github.com/syncthing/syncthing
 
 	# Unset GOARCH so building build.go works.
-	export GO_ARCH=$GOARCH
-	export _CC=$CC
+	export GO_ARCH="${GOARCH}"
+	export _CC="${CC}"
+	export GO_OS="${GOOS}"
 	unset GOOS GOARCH CC
 
+	rm -rf vendor # syncthing has vendored dependencies, which fails with our compiler.
 	# Now file structure is same as go get etc.
-	go build build.go
-	export CC=$_CC
-	./build -goos android \
-		-goarch $GO_ARCH \
-		-no-upgrade \
-		-version v$TERMUX_PKG_VERSION \
-		build
+	go run build.go -goos "${GO_OS}" -goarch "${GO_ARCH}" \
+		-cc "${_CC}" -version "${TERMUX_PKG_VERSION}" -no-upgrade build
 }
 
 termux_step_make_install() {
-	cp go/src/github.com/syncthing/syncthing/syncthing $TERMUX_PREFIX/bin/
+	cp "${GOPATH}"/src/github.com/syncthing/syncthing/syncthing $TERMUX_PREFIX/bin/
 
 	for section in 1 5 7; do
 		local MANDIR=$TERMUX_PREFIX/share/man/man$section