Update build.sh

使用 gcc-4.8 编译

build.sh

@@ -1,6 +1,7 @@
 #!/bin/bash
 
 ACTION_PATH=$(dirname $(readlink -f $0))
+export CC=gcc-4.8
 $ACTION_PATH/build-ext.sh
 chmod +x $ACTION_PATH/build-page.sh
 set -e
@@ -50,4 +51,4 @@ do
 done
 [ "$INPUT_USEQEMU" = "1" ] && ssh grubdev sudo poweroff
 echo "GRUB4DOS_VER=$GRUB4DOS_VER" >> $GITHUB_ENV
-echo "GRUB4DOS_BIN=grub4dos-$GRUB4DOS_VER-`date -u +%Y-%m-%d`.7z" >> $GITHUB_ENV
+echo "GRUB4DOS_BIN=grub4dos-$GRUB4DOS_VER-`date -u +%Y-%m-%d`.7z" >> $GITHUB_ENV