Issue with test runtimes generating multiple runtimes

[chevdor]

srtool/scripts/build

Lines 124 to 127 in 5101648

	fi
	WASM=`find "target/srtool/$PROFILE/wbuild/$PACKAGE" -type f -name "*.compact.wasm"`
	Z_WASM=`find "target/srtool/$PROFILE/wbuild/$PACKAGE" -type f -name "*.compact.compressed.wasm"`
	popd > /dev/null || exit 1

The SDK repo contains a few test runtimes:

• substrate-test
• polkadot-test
• cumulus-test

While polkadot-test builds OK, the other fails due to the fact that they use the wasmbuilder to build not one but several runtimes.

The srtool script then finds the wrong one and fails.