rimage: Update to commit 0d2af68

Included changes:

0d2af68 gitignore: Add checkpatch temporary file to gitignore
8249abf toml: Keep available manifest parsers in list
c98a29d toml: Extract version parsing to separate function
b9cf1ae pkcs1_5.c: don't pretend everything is fine when failing to sign
e87db0f pkcs1_5.c: intermediate named constants in ri_manifest_sign_v1_x()
86754c1 hash: Assert memory overflow during hash calculation
37323fa Merge pull request thesofproject#28 from marc-hb/copy-sram-overflow
7322c02 manifest.c: assert buffer overflow in man_copy_sram()

Signed-off-by: Karol Trzcinski <karolx.trzcinski@linux.intel.com>