Minor fixes to toolchain build scripts

kotlin-native/tools/toolchain_builder/build_toolchain.sh

@@ -8,9 +8,9 @@ HOME=/home/ct
 ZLIB_VERSION=1.2.11
 
 build_toolchain() {
-  mkdir $HOME/build-$TARGET
-  cd $HOME/build-$TARGET
-  cp $HOME/toolchains/$TARGET/$VERSION.config .config
+  mkdir $HOME/build-"$TARGET"
+  cd $HOME/build-"$TARGET"
+  cp $HOME/toolchains/"$TARGET"/"$VERSION".config .config
   ct-ng build
   cd ..
 }
@@ -26,7 +26,7 @@ build_zlib() {
   AR=$TOOLCHAIN_BIN_PREFIX-ar \
   RANLIB=$TOOLCHAIN_BIN_PREFIX-ranlib \
   ./configure \
-  --prefix=$INSTALL_PATH
+  --prefix="$INSTALL_PATH"
 
   make && make install
 }
@@ -34,10 +34,10 @@ build_zlib() {
 build_archive() {
   cd $HOME/x-tools
   FULL_NAME=$TARGET-$VERSION
-  mv $TARGET $FULL_NAME
-  ARCHIVE_NAME="$FULL_NAME.tar.xz"
-  tar -czvf $ARCHIVE_NAME $FULL_NAME
-  cp $ARCHIVE_NAME /artifacts/$ARCHIVE_NAME
+  mv "$TARGET" "$FULL_NAME"
+  ARCHIVE_NAME="$FULL_NAME.tar.gz"
+  tar -czvf "$ARCHIVE_NAME" "$FULL_NAME"
+  cp "$ARCHIVE_NAME" /artifacts/"$ARCHIVE_NAME"
 }
 
 echo "building toolchain for $TARGET"