scripts/test: JVM argument support

Let user pass JVM arguments to script/tests. This enables running the
test suite with different backends enabled.

Signed-off-by: Pekka Enberg <penberg@kernel.org>
java/translator: Integer arithmetic

Signed-off-by: Pekka Enberg <penberg@kernel.org>
dynasm: Integer arithmetic

Signed-off-by: Pekka Enberg <penberg@kernel.org>
llvm: Integer arithmetic

Signed-off-by: Pekka Enberg <penberg@kernel.org>
tests: Integer arithmetic

Signed-off-by: Pekka Enberg <penberg@kernel.org>