bitbake: fetch2: allow hiding checksum warning

If BB_STRICT_CHECKSUMS is set to "ignore" then don't display a warning
if no checksums are specified in the recipe. This is not intended to be
used from recipes - it is needed when we move to using more standard
code paths to fetch new files from scripts i.e. where we don't know what
the checksums are in advance.

(Bitbake rev: f15ca7339de8a448a93a14cf6130b3925178a920)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/fetch2/__init__.py

@@ -584,6 +584,12 @@ def verify_checksum(ud, d, precomputed={}):
                               ud.sha256_name, sha256data))
             raise NoChecksumError('Missing SRC_URI checksum', ud.url)
 
+        if strict == "ignore":
+            return {
+                _MD5_KEY: md5data,
+                _SHA256_KEY: sha256data
+            }
+
         # Log missing sums so user can more easily add them
         logger.warning('Missing md5 SRC_URI checksum for %s, consider adding to the recipe:\n'
                        'SRC_URI[%s] = "%s"',