util/incore update that allows FINGERPRINT_premain-free build.
As for complementary fips.c modification. Goal is to ensure that FIPS_signature does not end up in .bss segment, one guaranteed to be zeroed upon program start-up. One would expect explicitly initialized values to end up in .data segment, but it turned out that values explicitly initialized with zeros can end up in .bss. The modification does not affect program flow, because first byte was the only one of significance [to FINGERPRINT_premain]. Reviewed-by:Dr. Stephen Henson <steve@openssl.org> (cherry picked from commit 34f39b06)
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