Expect FreeBSD 5.* to have standard float arithmetic.

Author: tglsfdc

src/test/regress/resultmap

@@ -7,7 +7,7 @@ abstime/sparc-sun-solaris=abstime-solaris-1947
 abstime/.*-sco=abstime-solaris-1947
 abstime/.*-sysv5=abstime-solaris-1947
 float4/.*-qnx=float4-exp-three-digits
-float8/i.86-.*-freebsd=float8-small-is-zero
+float8/i.86-.*-freebsd4=float8-small-is-zero
 float8/i.86-.*-openbsd=float8-small-is-zero
 float8/i.86-.*-netbsd=float8-small-is-zero
 float8/.*-qnx=float8-exp-three-digits