Fix bintray release structure (#531)

Same file name is not allowed across packages in one version.
diff --git a/.bintray.json b/.bintray.json
index 98fa88d..592f8cc 100644
--- a/.bintray.json
+++ b/.bintray.json
@@ -1,31 +1,21 @@
 {
     "package": {
-        "name": "${TRAVIS_OS_NAME}-bin",
+        "name": "snapshots",
         "repo": "brotli",
         "subject": "eustas"
     },
 
     "version": {
-        "name": "${RELEASE_VERSION}",
-        "desc": "Binary Artifacts (Snapshot)",
+        "name": "${TRAVIS_OS_NAME}-${RELEASE_DATE}",
+        "desc": "Binary Artifacts (Dev)",
         "released": "${RELEASE_DATE}",
         "gpgSign": false
     },
 
     "files": [
         {
-            "includePattern": "bazel-bin/(libbrotli.*\\.a)",
-            "uploadPattern": "$1",
-            "matrix_params": {"override": 1}
-        },
-        {
-            "includePattern": "bazel-bin/(libbrotli.*\\.so)",
-            "uploadPattern": "$1",
-            "matrix_params": {"override": 1}
-        },
-        {
-            "includePattern": "bazel-bin/bro",
-            "uploadPattern": "bro",
+            "includePattern": "brotli.zip",
+            "uploadPattern": "brotli.zip",
             "matrix_params": {"override": 1}
         }
     ],
diff --git a/.travis.sh b/.travis.sh
index 7e3ad9c..d84d105 100755
--- a/.travis.sh
+++ b/.travis.sh
@@ -91,8 +91,8 @@
 	case "${BUILD_SYSTEM}" in
 	    "bazel")
 		export RELEASE_DATE=`date +%Y-%m-%d`
-		export RELEASE_VERSION=`date +snapshot.%Y.%m.%d`
 		perl -p -i -e 's/\$\{([^}]+)\}/defined $ENV{$1} ? $ENV{$1} : $&/eg' .bintray.json
+		zip -j9 brotli.zip bazel-bin/libbrotli*.a bazel-bin/libbrotli*.so bazel-bin/bro
 		;;
 	esac
 	;;