make: Replace deprecated emcc configuration

EXTRA_EXPORTED_RUNTIME_METHODS is deprecated. Replace with
EXPORTED_RUNTIME_METHODS.
5 jobs for ci/pipeline in 2 minutes and 56 seconds (queued for 17 seconds)
Status Job ID Name Coverage
  Build
passed #12312
docker
build:lib

00:02:03

 
  Test
passed #12313
docker
test:lib

00:00:53

 
  Trigger
passed trigger:android

passed trigger:javascript

passed trigger:python