classpath: avoid picking up gmp.h from the host
classpath: avoid picking up gmp.h from the host

Signed-off-by: Jan Luebbe <3a82f1ac4ad59607a20f180f1c67ac8ba31ad0d5@pengutronix.de>
Signed-off-by: Henning Heinold <13f185057069a88545ddfd120093968ca4a4b810@inf.fu-berlin.de>

rdm-dev/meta-java,rehsack/meta-java,rehsack/meta-java,rdm-dev/meta-java,rehsack/meta-java,Valtis/meta-java,tobw/meta-java,woglinde/meta-java,rehsack/meta-java,tobw/meta-java,tobw/meta-java,sunlabtech/meta-java,woglinde/meta-java,Valtis/meta-java,rdm-dev/meta-java,Valtis/meta-java,rehsack/meta-java,woglinde/meta-java