Add GCP fetcher to list of supported protocols

If accepted, this patch should merge with the corresponding BitBake
patch titled "fetch2: add Google Cloud Platform (GCP) fetcher".

(From OE-Core rev: 1e2e596bcdff031d7d7dc1d6f6adbb03d9ec2995)

Signed-off-by: Emil Ekmečić <eekmecic@snap.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes-global/sanity.bbclass

@@ -871,7 +871,8 @@ def check_sanity_everybuild(status, d):
     mirror_vars = ['MIRRORS', 'PREMIRRORS', 'SSTATE_MIRRORS']
     protocols = ['http', 'ftp', 'file', 'https', \
                  'git', 'gitsm', 'hg', 'osc', 'p4', 'svn', \
-                 'bzr', 'cvs', 'npm', 'sftp', 'ssh', 's3', 'az', 'ftps', 'crate']
+                 'bzr', 'cvs', 'npm', 'sftp', 'ssh', 's3', \
+                 'az', 'ftps', 'crate', 'gs']
     for mirror_var in mirror_vars:
         mirrors = (d.getVar(mirror_var) or '').replace('\\n', ' ').split()
 

meta/classes/own-mirrors.bbclass

@@ -18,4 +18,5 @@ ftp://.*/.*     ${SOURCE_MIRROR_URL} \
 npm://.*/?.*    ${SOURCE_MIRROR_URL} \
 s3://.*/.*      ${SOURCE_MIRROR_URL} \
 crate://.*/.*   ${SOURCE_MIRROR_URL} \
+gs://.*/.*      ${SOURCE_MIRROR_URL} \
 "