Adds android example using jni.

examples/cross_calculator/android/scripts/jnibuild.sh

@@ -0,0 +1,22 @@
+#!/bin/sh
+
+# Force errors to fail script.
+set -e
+
+# If we are running from inside the scripts subdir, get out.
+if [ ! -d src ]
+then
+	cd ..
+fi
+
+# Ok, are we out now?
+if [ -d src ]
+then
+	javah -classpath bin/classes \
+		-o jni/backend-jni.h \
+		com.github.nimrod.crosscalculator.CrossCalculator
+else
+	echo "Uh oh, bin/classes directory not found?"
+	echo "Try compiling your java code, or opening in eclipse."
+	exit 1
+fi

examples/cross_calculator/android/scripts/nimbuild.sh

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+#!/bin/sh
+
+# Set this to the local or full path of your nimrod compiler
+PATH_TO_NIMROD=~/project/nimrod/bin/nimrod
+# Set this to the location of the nimbase.h file so
+# the script can update it if it changes.
+PATH_TO_NIMBASE=~/project/nimrod/lib/nimbase.h
+
+# Force errors to fail script.
+set -e
+
+# If we are running from inside the scripts subdir, get out.
+if [ ! -d src ]
+then
+	cd ..
+fi
+
+DEST_NIMBASE=jni/nimcache/nimbase.h
+
+# Ok, are we out now?
+if [ -d src ]
+then
+	$PATH_TO_NIMROD c --noMain  --app:lib \
+		--nimcache:jni/nimcache --cpu:arm --os:linux \
+		--compileOnly --header ../nimrod_backend/*.nim
+	if [ "${PATH_TO_NIMBASE}" -nt "${DEST_NIMBASE}" ]
+	then
+		echo "Updating nimbase.h"
+		cp "${PATH_TO_NIMBASE}" "${DEST_NIMBASE}"
+	fi
+else
+	echo "Uh oh, src directory not found?"
+	exit 1
+fi

examples/cross_calculator/android/scripts/tags.sh

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+#!/bin/sh
+
+if [ ! -d src ]
+then
+	cd ..
+fi
+
+if [ -d src ]
+then
+	~/bin/objctags -R \
+		jni \
+		src
+fi