Added new tool, grub-scrit-check to verify grub.cfg syntax.
* util/grub-script-check.c: grub-script-check tool.
* conf/common.rmk: Make rules for grub-script-check.
Unit testing framework for GRUB.
* Makefile.in: Test framework build rules for 'make check'.
* conf/tests.rmk: Build rules for individual tests and framework.
* include/grub/test.h: Header file for whitebox tests.
* tests/lib/functional_test.c: Framework support for whitebox
functional tests.
* tests/lib/test.c: Common whitebox testing code for unit and
functional tests.
* tests/lib/unit_test.c: Framework support for whitebox unit
tests.
* tests/util/grub-shell-tester.in: Support utility for grub-script
tests.
* tests/util/grub-shell.in: Utility to execute grub-script
commands in a Qemu instance.
* tests/example_functional_test.c: Example whitebox functional
test.
* tests/example_grub_script_test.in: Example grub-script test.
* tests/example_scripted_test.in: Example scripted test.
* tests/example_unit_test.c: Example whitebox unit test.
BVK Chaitanya