cmake : remove STATIC from impl libraries, enable LLAMA_BUILD_APP by … #234

Job	Run time
openEuler-latest-cann (aarch64, 310p, Release, off)	10m 30s
openEuler-latest-cann (x86, 910b, Release, off)	11m 48s
openEuler-latest-cann (aarch64, 910b, Release, on)	9m 59s
openEuler-latest-cann (x86, 910b, Release, on)	12m 27s
openEuler-latest-cann (aarch64, 910b, Release, off)	9m 49s
openEuler-latest-cann (x86, 310p, Release, off)	11m 31s
	1h 6m 4s

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