Fixed license identifiers in bower.json and composer.json.

The license identifiers should conform to the SPDX Open Source License
Registry entries. Right now some tools like Webjars will fail due to the
mismatch of license tag.

bower.json

@@ -27,7 +27,7 @@
         "jquery": ">= 1.9.0",
         "bootstrap": ">= 3.0.0"
     },
-    "license": "BSD-3",
+    "license": "BSD-3-Clause",
     "ignore": [
         "**/.*",
         "node_modules",

composer.json

@@ -3,7 +3,7 @@
     "description": "An enhanced HTML 5 file input for Bootstrap 3.x with features for file preview for many file types, multiple selection, ajax uploads, and more.",
     "keywords": ["bootstrap", "jquery", "file", "input", "preview", "upload", "image", "multiple", "ajax", "delete", "progress"],
     "homepage": "https://github.com/kartik-v/bootstrap-fileinput",
-    "license": "BSD 3-Clause",
+    "license": "BSD-3-Clause",
     "authors": [
         {
             "name": "Kartik Visweswaran",