Signed-off-by: Tibor Vass [email protected]

Diff: moby/buildkit@950603d...v0.8.1

• llb: make sure fileop uses the platform for current state llb: make sure fileop uses the platform for current state buildkit#1889
• solver: delay before discarding job solver: delay before discarding job buildkit#1887
• fix building from git url without a protocol fix building from git url without a protocol buildkit#1886 (not affecting moby)
• flightcontrol: fix possible invalid cancellation flightcontrol: fix possible invalid cancellation buildkit#1891
• solver: fix slow-cache status tracking with preprocess solver: fix slow-cache status tracking with preprocess buildkit#1871
• handle foreign mediatypes on push handle foreign mediatypes on push buildkit#1879 (not affecting moby)
• exporter: return config digest when exporting single-arch image exporter: return config digest when exporting single-arch image buildkit#1897 (not affecting moby)
• allow nil return from frontend allow nil return from frontend buildkit#1898