libc/arm: add acle-compat license

add acle-compat implementation, and the implementation are ported from newlib

Signed-off-by: chao an <anchao@xiaomi.com>

Author: anchao

LICENSE

@@ -652,6 +652,10 @@ libs/libc/machine/arm/armv8-m/gnu/arch_memcpy.S
 
 libs/libc/machine/arm/armv7-m/gnu/arch_strcmp.S
 libs/libc/machine/arm/armv8-m/gnu/arch_strcmp.S
+libs/libc/machine/arm/armv7-m/gnu/acle-compat.h
+libs/libc/machine/arm/armv8-m/gnu/acle-compat.h
+libs/libc/machine/arm/armv7-r/gnu/acle-compat.h
+libs/libc/machine/arm/armv7-a/gnu/acle-compat.h
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