opk/write: Fix memory leaks

opk->temp_file_name wasn't freed when either of the
_opkg_opk_opk_build_inner_archive() calls failed.

Fixes:

    Direct leak of 73 byte(s) in 1 object(s) allocated from:
        #0 0x7fde9c5c4d28 in malloc (/usr/lib/x86_64-linux-gnu/libasan.so.3+0xc1d28)
        #1 0x563aeebbc4e8 in opkg_opk_opk_write src/opk/write.c:512
        #2 0x563aeebb4351 in main src/main.c:357
        #3 0x7fde9bc5b2e0 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x202e0)

0 files changed, 0 insertions, 0 deletions