Avoid to the heap-based buffer overflow.
Upgrade to the below package to fix the CVE issue:
grub2-2.02-0.86.el7.centos.src.rpm
At the same time adjust the context and drop
0004-grub2-remove-32b-requirements.patch since it already had been
included in the new version.
Story: 2008532
Task: 41664
Change-Id: I7943127323ee28457ffe0a4ece54764633f86d9f
Signed-off-by: Zhixiong Chi <zhixiong.chi@windriver.com>