Patches for CVEs found in reused component libgit2 by using VulSCA

[Chaofanli1]

CVEs and affected files:
CVE-2018-10887 in the file deps/libgit2-0.27.2/src/delta.c

References:
NVD descriptions:
https://nvd.nist.gov/vuln/detail/CVE-2018-10887

GitHub Security Advisories:
GHSA-5gcq-g5p3-pjp4

** Github commits:**
libgit2/libgit2@3f46190
Patch suggestions:
deps/libgit2-0.27.2/src/delta.c are form the older version of libgit2,it is recommended to update the file to the latest version or just apply the above commits for CVE-2018-10887 .