travis: Generate grub_x64.efi for qemu-x86_64

grub_x86.efi is for 32-bit QEMU. Generate the 64-bit one.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

.travis.yml

@@ -26,6 +26,7 @@ addons:
     - libpython-dev
     - iasl
     - grub-efi-ia32-bin
+    - grub-efi-amd64-bin
     - rpm2cpio
     - wget
     - device-tree-compiler
@@ -49,6 +50,7 @@ install:
  - pip install pytest
  - pip install python-subunit
  - grub-mkimage -o ~/grub_x86.efi -O i386-efi normal  echo lsefimmap lsefi lsefisystab efinet tftp minicmd
+ - grub-mkimage -o ~/grub_x64.efi -O x86_64-efi normal  echo lsefimmap lsefi lsefisystab efinet tftp minicmd
  - mkdir ~/grub2-arm
  - ( cd ~/grub2-arm; wget -O - http://download.opensuse.org/ports/armv7hl/distribution/leap/42.2/repo/oss/suse/armv7hl/grub2-arm-efi-2.02~beta2-87.1.armv7hl.rpm | rpm2cpio | cpio -di )
  - mkdir ~/grub2-arm64
@@ -128,6 +130,7 @@ script:
  # value.
  - export UBOOT_TRAVIS_BUILD_DIR=`cd .. && pwd`/.bm-work/${TEST_PY_BD};
    cp ~/grub_x86.efi $UBOOT_TRAVIS_BUILD_DIR/;
+   cp ~/grub_x64.efi $UBOOT_TRAVIS_BUILD_DIR/;
    cp ~/grub2-arm/usr/lib/grub2/arm-efi/grub.efi $UBOOT_TRAVIS_BUILD_DIR/grub_arm.efi;
    cp ~/grub2-arm64/usr/lib/grub2/arm64-efi/grub.efi $UBOOT_TRAVIS_BUILD_DIR/grub_arm64.efi;
    if [[ "${TEST_PY_BD}" != "" ]]; then