travis, build: fix mobile build issues on travis

.travis.yml

@@ -68,6 +68,7 @@ matrix:
         - go run build/ci.go archive -type tar -signer OSX_SIGNING_KEY -upload gethstore/builds
 
         # Build the iOS framework and upload it to CocoaPods and Azure
+        - gem uninstall cocoapods -a
         - gem install cocoapods --pre
         - travis_wait 30 go run build/ci.go xcode -signer IOS_SIGNING_KEY -deploy trunk -upload gethstore/builds
 

build/mvn.settings

@@ -16,7 +16,7 @@
         <activeByDefault>true</activeByDefault>
       </activation>
       <properties>
-        <gpg.executable>gpg</gpg.executable>
+        <gpg.executable>gpg2</gpg.executable>
         <gpg.passphrase></gpg.passphrase>
       </properties>
     </profile>