fix(@angular-devkit/build-angular): support aot option for karma brow… #1302

Job	Run time
build	12s
lint	2m 40s
Browser Compatibility Tests	0s
test	0s
publish-snapshots	0s
e2e-package-managers	0s
e2e	0s
e2e-snapshots	0s
	2m 52s

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