adb: fix mac build

Ensure that off64_t is defined when building adb for mac

Fixes: 139646013
Test: make # On mac
Change-Id: I32b68738d71c8a63a35c22434092933dcabac1ce
(cherry picked from commit 2167b9082dcbe12a6e4f7f966ae6a39ec241d126)
1 file changed