--javacopt value supplied via .bazelrc file is not passed properly to java compiler

[oliviernotteghem]

We are using javacopt to disabled errorprone on generated files.

If specified in .bazelrc, the corresponding javacopt is ignored (EP is showing legit errors) :
build --javacopt=-XepExcludedPaths:.*/.*genfiles/.*

If specified in the android_library rule itself, javacopt is passed properly (EP is disabled and no errors) :
java_library( name = "src_main", srcs = glob(["src/main/java/**/*.java"]), javacopts = ["-XepExcludedPaths:.*/.*genfiles/.*"], visibility = ["//visibility:public"], ... )