devel/git-cinnabar: update to 0.4.0.13 to unbreak with git 2.13

../cinnabar-helper.c:859:4: warning: implicit declaration of function 'sha1_array_append' is invalid

in C99 [-Wimplicit-function-declaration]
                  sha1_array_append(array, sha1);
                  ^

../cinnabar-helper.c:866:20: error: variable has incomplete type 'struct sha1_array'

struct sha1_array nodes = SHA1_ARRAY_INIT;
                  ^

Changes: https://github.com/glandium/git-cinnabar/compare/cd0e1bb...a93db61
MFH: 2017Q2 (chasing r440558)