ARC: MWDT: don't use compact C library
ARC: MWDT: don't use compact C library

-Hcl option instructs linker to use MetaWare C Compactlib.
According to MWDT documentation "Compactlib is not thread-safe"

So, let's use MetaWare C library instead which is thread-safe.

Signed-off-by: Evgeniy Paltsev <7de4ab8b01334d64e4e84734c688a8a936513edc@gmail.com>

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