chromium, html5-*: adapt to kirkstone

chromium, html5-*: adapt to kirkstone

Adapt the recipes to the changes required by Yocto kirkstone:
* Explicit python2 dependency.
* Replace _ with : as separator in variables.
* Explicit pkgconfig dependency.
* Assume always upstream ozone wayland.

chromium91: 2c7cb69495..d052051b3b
d052051b3b [op][ups][build] Fix with more recent libstdc++ in kirkstone
deb1439137 [op][ups][build] Fix breakpad build with kirkstone glibc.
e6ee1dd0d0 [op][ups][build] Fix abseil-cpp build with glibc in kirkstone

wam: 692f706..31840bc
31840bc [op][w_upsable] IWYU: std::string used in LogManagerConsole
15ce17e [op][n_upsable][build] IWYU: std::numeric_limit used in WebPageBlink missing include.
848565d fixup! [op][agl] New QtLess AGL port

html5-homescreen: 5c9e060..fc0ffa4
fc0ffa4 Update to recent dependencies
a42b304 Launch background after launcher.

html5-launcher: cb6b66c..1283e3b
1283e3b Update dependencies.

html5-background: 7b79640..e91be22
e91be22 Update to recent dependencies.

html5-hvac: e64d69b..6abbe87
6abbe87 Update to recent dependencies.

Bug-AGL: SPEC-4261
Change-Id: I48581a57df3ff22d8aaab2334e4f9b4127a6d427
Signed-off-by: Jose Dapena Paz <jdapena@igalia.com>