stats_log_api_gen: Minor printf format fix

We use "%zu" for a size_t argumet.

Test: TreeHugger
Bug: 126134616
Change-Id: I02916829dfb71a63f78eda0d45129b4dc0732a82
Merged-In: I02916829dfb71a63f78eda0d45129b4dc0732a82
(cherry picked from commit f87e93835a9cbebec2a46124f0f0b7e967de0d52)
1 file changed