See https://www.gnu.org/software/make/manual/html_node/File-Name-Functions.html#File-Name-Functions
To confirm that the Makefiles works as expected after this patch, the
list of executed commands before and after is compared:
Before:
```
make --dry-run > ../dockcross-make-baseline
make test --dry-run > ../dockcross-make-test-baseline
```
After:
```
make --dry-run > ../dockcross-make-current;
make test --dry-run > ../dockcross-make-test-current
for target in make make-test; do
diff ../dockcross-$target-current ../dockcross-$target-baseline > /dev/null 2>&1
[[ $? == 1 ]] && \
echo "" && \
echo "Error: Problem with '${target}' target: Dry-run output before and after this commit do not match."
done
```
To confirm that the Makefiles works as expected after this patch, the
list of executed commands before and after is compared:
Before:
```
make --dry-run > ../dockcross-make-baseline
make test --dry-run > ../dockcross-make-test-baseline
```
After:
```
make --dry-run > ../dockcross-make-current;
make test --dry-run > ../dockcross-make-test-current
for target in make make-test; do
diff ../dockcross-$target-current ../dockcross-$target-baseline > /dev/null 2>&1
[[ $? == 1 ]] && \
echo "" && \
echo "Error: Problem with '${target}' target: Dry-run output before and after this commit do not match."
done
```
This commits add test targets for all images, this will facilitate local
testing.
In addition to the usual targets:
make android-arm
make browser-asmjs
[...]
the following targets are now available:
make tests
make android-arm.test
make browser-asmjs.test
[...]
Note that the target "all" has been renamed into "images"
