Updated htscodecs module to version 1.0.

The upstream master repository for this has also now changed, from
jkbonfield/htscodecs to samtools/htscodecs.  (The jkbonfield one still
exists as I use it for making PRs against the canonical copy at
samtools, but the master branch will almost certainly not be kept up
to date.)

Author: jkbonfield

.gitmodules

@@ -1,4 +1,4 @@
 [submodule "htscodecs"]
 	path = htscodecs
-	url = https://github.com/jkbonfield/htscodecs.git
+	url = https://github.com/samtools/htscodecs.git
 	ignore = untracked