* gnu/packages/version-control.scm (libgit2): Update to 0.26.4. (source): Adjust patch name. * gnu/packages/patches/libgit2-0.25.1-mtime-0.patch: Rename to ... * gnu/packages/patches/libgit2-mtime-0.patch: ... this. * gnu/local.mk (dist_patch_DATA): Adjust accordingly.