Rename files so it no longer looks like we are doing ghash

diff --git a/src/ext/polyval/ghash_ctmul.c b/src/ext/polyval/ctmul.c
similarity index 100%
rename from src/ext/polyval/ghash_ctmul.c
rename to src/ext/polyval/ctmul.c

diff --git a/src/ext/polyval/ghash_ctmul64.c b/src/ext/polyval/ctmul64.c
similarity index 100%
rename from src/ext/polyval/ghash_ctmul64.c
rename to src/ext/polyval/ctmul64.c

diff --git a/src/ext/polyval/ghash_pclmul.c b/src/ext/polyval/pclmul.c
similarity index 100%
rename from src/ext/polyval/ghash_pclmul.c
rename to src/ext/polyval/pclmul.c