Merge greenkeeper/prebuild-7.6.1 into master

Author: NodeOS-bot

package.json

@@ -36,7 +36,7 @@
     "ci-publish": "^1.3.1",
     "minimist": "^1.2.0",
     "nodeos-cross-toolchain": "^1.0.0-RC3.1",
-    "prebuild": "^7.4.0",
+    "prebuild": "^7.6.1",
     "qemu": "^2.11.1",
     "suppose": "^0.6.2"
   },