Automatic update from web-platform-testsRun script directly and don't source it
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Fix paths when building CSS testsuite
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Recommend `git submodule` instead of hg for w3ctestlib/apiclient
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Fix passing arguments to ./build-css-testsuites.sh
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Update w3ctestlib submodule
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Update CSS build system requirements
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Make it possible to set RUN_JOB globally
wpt-commits: e00868e2cc32b51bcc597400ef4ec1ca0fd5e4a7, 009fd7558acd69310568df2adf4292b9f10914af, 5241f45421bb3455b6b3bc362fa63293eb58ce48, fc544d570321a72c7418d45031db456db37c98be, 6b044b942db61b0f91454f254b1b1847c2d36e29, 11da4202dd2541e2dc2d36a4a3b2e265b4fcc6cc, 1305210bed8f4e3ef811998b219f220511d9a27d
wpt-pr: 9602
wpt-commits: e00868e2cc32b51bcc597400ef4ec1ca0fd5e4a7, 009fd7558acd69310568df2adf4292b9f10914af, 5241f45421bb3455b6b3bc362fa63293eb58ce48, fc544d570321a72c7418d45031db456db37c98be, 6b044b942db61b0f91454f254b1b1847c2d36e29, 11da4202dd2541e2dc2d36a4a3b2e265b4fcc6cc, 1305210bed8f4e3ef811998b219f220511d9a27d
wpt-pr: 9602