Name release tarballs "python-gssapi-$VER"

This commit changes the name of release tarballs from "v${VER}" to
"python-gssapi-${VER}".

Author: DirectXMan12

.travis.before-deploy.sh

@@ -15,6 +15,7 @@ else
     PYTHON_GSSAPI_VERSION=${TRAVIS_TAG#v}
 fi
 
+PKG_NAME_VER="python-gssapi-${PYTHON_GSSAPI_VERSION}"
 
-tar -czvf ./tag_build/${TRAVIS_TAG}.tar.gz --exclude='tag_build' --exclude='.git' --transform "s,^\.,python-gssapi-${PYTHON_GSSAPI_VERSION}," .
-sha512sum --binary ./tag_build/${TRAVIS_TAG}.tar.gz > ./tag_build/${TRAVIS_TAG}.sha512sum
+tar -czvf ./tag_build/${PKG_NAME_VER}.tar.gz --exclude='tag_build' --exclude='.git' --transform "s,^\.,${PKG_NAME_VER}," .
+sha512sum --binary ./tag_build/${PKG_NAME_VER}.tar.gz > ./tag_build/${PKG_NAME_VER}.sha512sum