Use CFLAGS and LDFLAGS when compiling mkmagic. This ensures that all the correct flags are being used (esp. NO_WERROR wrt clang).
Use CFLAGS and LDFLAGS when compiling mkmagic. This ensures that all the
correct flags are being used (esp. NO_WERROR wrt clang).

Submitted by:	Dimitry Andric <dimitry at andric.com>
Reviewed by:	ru

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