build-package.sh: use bsdtar for on-device builds when extracting into massagedir

Tar built for API 21 branch doesn't work well in certain cases and following error
may occur:

 tar: ./share/doc/ed/LICENSE: Cannot change mode to rwx------: No such file or directory
 tar: Exiting with failure status due to previous errors

Using bsdtar instead for extracting.

scripts/build/termux_step_extract_into_massagedir.sh

@@ -8,6 +8,14 @@ termux_step_extract_into_massagedir() {
 	# Extract tar in order to massage it
 	mkdir -p "$TERMUX_PKG_MASSAGEDIR/$TERMUX_PREFIX"
 	cd "$TERMUX_PKG_MASSAGEDIR/$TERMUX_PREFIX"
+
+	if [ -n "$TERMUX_ON_DEVICE_BUILD" ]; then
+		# Tar on android-5 may show error like 'Cannot change mode to ...: No such file or directory'
+		# when extracting symlinks. Using bsdtar instead as workaround.
+		bsdtar xf "$TARBALL_ORIG"
+	else
 		tar xf "$TARBALL_ORIG"
+	fi
+
 	rm "$TARBALL_ORIG"
 }

scripts/setup-termux.sh

@@ -4,6 +4,7 @@ PACKAGES="autoconf"
 PACKAGES+=" automake"
 PACKAGES+=" bc"
 PACKAGES+=" bison"
+PACKAGES+=" bsdtar"
 PACKAGES+=" bzip2"
 PACKAGES+=" clang"
 PACKAGES+=" cmake"