Hi, bcftools version 1.2 is out. The sources are now on github. Could you please update the ebuild. see: http://www.htslib.org/download/ thanking you!
As this package is part of the science overlay, could you do a pull request on https://github.com/gentoo-science/sci
bcftools were bumped in March: *bcftools-1.2 (02 Mar 2015) 02 Mar 2015; Martin Mokrejs <mmokrejs@fold.natur.cuni.cz> +bcftools-1.2.ebuild, -bcftools-1.1.ebuild: version bump, respect CC and CFLAGS