100644 blob f173029a05a3063afcfa3c31d3ef19090effa6a7	fetch_sources.py
040000 tree b2c9d564eba550fa28ccb5f127c1c53fd02f8825	glslang
040000 tree 61cce8890695e498604f32df6ec51c5fd1310a5b	libpng
040000 tree f74c1c859ea886c7c3503b2d3d72293d22deb4a9	spirv-tools
040000 tree fdadf51ae37806d2419a4407ea95f20189605f7b	vulkancts
040000 tree 36b6e0af84ce4e2af172f51f1240460da470ceac	zlib