Bug 1576011 - set expectation for tests in gl1c for tests that pass in Debian 10 r=jmaher

Changes:
- when specifying `fail-if` condition for linux platform, narrow down the scope using Ubuntu version `16.04` since some tests are passing on Debian 10

Differential Revision: https://phabricator.services.mozilla.com/D43172

--HG--
extra : moz-landing-system : lando

dom/canvas/test/webgl-mochitest/mochitest.ini

@@ -29,7 +29,7 @@ fail-if = (os == 'android')
 [ensure-exts/test_EXT_shader_texture_lod.html]
 fail-if = (os == 'android')
 [ensure-exts/test_EXT_texture_compression_bptc.html]
-fail-if = (os == 'android') || (os == 'linux') || (os == 'mac')
+fail-if = (os == 'android') || (os == 'linux' && os_version == '16.04') || (os == 'mac')
 [ensure-exts/test_EXT_texture_compression_rgtc.html]
 fail-if = (os == 'android') || (os == 'win')
 [ensure-exts/test_EXT_texture_filter_anisotropic.html]
@@ -43,7 +43,7 @@ fail-if = (os == 'linux') || (os == 'mac')
 [ensure-exts/test_WEBGL_color_buffer_float.html]
 fail-if = (os == 'android')
 [ensure-exts/test_WEBGL_compressed_texture_astc.html]
-fail-if = (os == 'android') || (os == 'linux') || (os == 'mac') || (os == 'win')
+fail-if = (os == 'android') || (os == 'linux' && os_version == '16.04') || (os == 'mac') || (os == 'win')
 [ensure-exts/test_WEBGL_compressed_texture_etc.html]
 fail-if = (os == 'android') || (os == 'mac') || (os == 'win')
 [ensure-exts/test_WEBGL_compressed_texture_etc1.html]