trustedgrub2-1.4.0-bp150.2.5

- Fix build against flex-2.6.4
  * grub2-fix-build-with-flex-2.6.4.patch

- Fix build aginst gcc-7
  * 0001-btrfs-avoid-used-uninitialized-error-with-GCC7.patch
  * 0002-i386-x86_64-ppc-fix-switch-fallthrough-cases-with-GC.patch
  * 0003-Add-gnulib-fix-gcc7-fallthrough.diff.patch

- disable PIE building, does not make sense for bootloader.
  * trustedgrub2-no-pie.patch
  * trustedgrub2-no-pie2.patch

- Fix build aginst glibc 2.25+
  * 0001-build-Use-AC_HEADER_MAJOR-to-find-device-macros.patch
  * 0002-configure-fix-check-for-sys-sysmacros.h-under-glibc-.patch

- Add COPYING to %doc

- New package trustedgrub2 (FATE#316553)