icedtea7-native: use openjdk_build_helper's ARCH translation functions
icedtea7-native: use openjdk_build_helper's ARCH translation functions

As the openjdk_build_helper now provides the ARCH translation function
use those and drop the local ones.

Signed-off-by: Richard Leitner <0f2fdd4d2dfbb4dde6236fd550af0a2071b34781@skidata.com>

rehsack/meta-java,rehsack/meta-java,rehsack/meta-java,rehsack/meta-java,rehsack/meta-java