fix(@angular-devkit/build-angular): fix app-shell route format and #2977

Job	Run time
build-e2e-windows	27s
build	18s
lint	1m 50s
test	-1s
publish-snapshots	-1s
Browser Compatibility Tests	-1s
e2e-snapshots	-1s
e2e	-1s
e2e-package-managers	-1s
e2e-windows	0s
	2m 29s

Provide feedback