ggml : fix arm build (llama/10890)

ggml : fix arm build (llama/10890)

* ggml: GGML_NATIVE uses -mcpu=native on ARM

Signed-off-by: Adrien Gallouët <redacted>
* ggml: Show detected features with GGML_NATIVE

Signed-off-by: Adrien Gallouët <redacted>
* remove msvc support, add GGML_CPU_ARM_ARCH option

* disable llamafile in android example

* march -> mcpu, skip adding feature macros

ggml-ci

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Signed-off-by: Adrien Gallouët <redacted>
Co-authored-by: Adrien Gallouët <redacted>