Fix snap install. Remove execstack from sharp, and bypass grpc error

.circleci/snap.sh

@@ -18,6 +18,7 @@ git clone -b $SNAP_CHANNEL git+ssh://rocket.chat.buildmaster@git.launchpad.net/r
 # Rarely will change, but just incase we copy it all
 cp -r resources buildinfo launchpad/
 sed s/#{RC_VERSION}/$RC_VERSION/ snapcraft.yaml > launchpad/snapcraft.yaml
+sed s/#{RC_VERSION}/$RC_VERSION/ resources/prepareRocketChat > launchpad/resources/prepareRocketChat
 
 cd launchpad
 git add resources snapcraft.yaml buildinfo

.snapcraft/resources/prepareRocketChat

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+curl -SLf "https://releases.rocket.chat/#{RC_VERSION}/download/" -o rocket.chat.tgz
+
+tar xvf rocket.chat.tgz --strip 1
+
+cd programs/server
+
+npm install
+
+# Ideally this will go away.  For some reason on install its installing node-v57-linux-x64-glibc but when actually running it is looking for node-v57-linux-x64-unknown
+if [[ $(uname -m) == "x86_64" ]]
+then
+  cp -r npm/node_modules/grpc/src/node/extension_binary/node-v57-linux-x64-glibc npm/node_modules/grpc/src/node/extension_binary/node-v57-linux-x64-unknown
+fi
+
+# sharp needs execution stack removed - https://forum.snapcraft.io/t/snap-and-executable-stacks/1812
+execstack --clear-execstack npm/node_modules/sharp/vendor/lib/librsvg-2.so.2.42.0

.snapcraft/snapcraft.yaml

@@ -49,17 +49,15 @@ parts:
         build-packages:
             - curl
         plugin: dump
-        prepare: curl -SLf "https://releases.rocket.chat/#{RC_VERSION}/download/" -o rocket.chat.tgz; tar xvf rocket.chat.tgz --strip 1; cd programs/server; npm install; npm install grpc@1.6.6;
+        prepare: ./resources/prepareRocketChat
         after: [node]
         source: .
         stage-packages:
-            - graphicsmagick
+            - execstack
         stage:
             - programs
             - main.js
             - .node_version.txt
-            - usr
-            - lib
     mongodb:
         build-packages:
             - wget