Audio: Template component: Add missing llext sources #21092

Job	Run time
LP64-WIP	4m 7s
manifest-check	50s
build-windows (imx8 imx8x imx8m imx8ulp)	9m 25s
build-linux (mnfst, imx8 imx8x imx8m imx8ulp)	6m 32s
build-windows (-d, lnl)	7m 21s
build-windows (tgl tgl-h)	7m 7s
build-windows (mtl lnl)	7m 33s
build-windows (ptl)	6m 26s
build-linux (zmain, tgl tgl-h)	5m 28s
build-linux (zmain, ptl)	4m 49s
build-linux (mnfst, tgl tgl-h)	5m 19s
build-linux (mnfst, ptl)	4m 34s
build-linux (mnfst, mtl lnl)	5m 33s
build-linux (zmain, mtl lnl)	5m 51s
build-linux (-d, mnfst, lnl)	4m 27s
build-linux (zmain, imx8 imx8x imx8m imx8ulp)	6m 37s
build-linux (mnfst, --all)	15m 46s
compare-linux-win	1m 12s
	1h 48m 57s

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