Make create_EXIF allocate enough memory

The create_EXIF method crashes if over 1K bytes exif header
is passed because only 1K byte is allocated for exif header.
It is hard to calcurate exact nessesary size for editing the
exif header dynamically, so this value is changed to the
mamixmum size of exif, 64K.

Change-Id: Ia2c8481da5130f02ec8f1c63ece9aa4289b1ad5f
1 file changed