Fixed linker error
Fixed linker error

Unix' systems need to link against libmath to
resolve "remainder" function reference in
"ucl_schema_validate_number" (ucl_schema.c).

allanjude/libucl,vstakhov/libucl,allanjude/libucl,vstakhov/libucl,allanjude/libucl,vstakhov/libucl,allanjude/libucl,vstakhov/libucl,vstakhov/libucl,allanjude/libucl