eget: fix github json handling (some servers return optimized nonformatted answer)

bin/tools_eget

@@ -1253,8 +1253,9 @@ get_github_urls()
     [ -n "$owner" ] || fatal "Can't get owner from $1"
     [ -n "$project" ] || fatal "Can't get project from $1"
     local URL="https://api.github.com/repos/$owner/$project/releases"
-    scat $URL | \
-        grep -i -o -E '"browser_download_url": "https://.*"' | cut -d'"' -f4
+    # api sometime returns unformatted json
+    scat $URL | sed -e 's|,\(["{]\)|,\n\1|g' | \
+        grep -i -o -E '"browser_download_url": *"https://.*"' | cut -d'"' -f4
 }
 
 # drop file path from URL