Android: AS no longer supports armeabi. Ensure that demo projects do not use it anymore

examples/DemoRunner/DemoRunner.jucer

@@ -93,7 +93,7 @@
                    androidEnableContentSharing="1" androidExtraAssetsFolder="../Assets"
                    smallIcon="YyqWd2" bigIcon="YyqWd2" cameraPermissionNeeded="1">
       <CONFIGURATIONS>
-        <CONFIGURATION isDebug="1" name="Debug" androidArchitectures="armeabi x86"/>
+        <CONFIGURATION isDebug="1" name="Debug" androidArchitectures="armeabi-v7a x86"/>
         <CONFIGURATION isDebug="0" name="Release"/>
       </CONFIGURATIONS>
       <MODULEPATHS>

extras/AudioPluginHost/AudioPluginHost.jucer

@@ -156,7 +156,7 @@
                    androidMinimumSDK="23" androidInternetNeeded="1" microphonePermissionNeeded="1"
                    androidBluetoothNeeded="1" smallIcon="c97aUr" bigIcon="c97aUr">
       <CONFIGURATIONS>
-        <CONFIGURATION name="Debug" androidArchitectures="armeabi x86" isDebug="1" optimisation="1"
+        <CONFIGURATION name="Debug" androidArchitectures="armeabi-v7a x86" isDebug="1" optimisation="1"
                        linkTimeOptimisation="0" targetName="Plugin Host"/>
         <CONFIGURATION name="Release" androidArchitectures="" isDebug="0" optimisation="3"
                        linkTimeOptimisation="1" targetName="Plugin Host"/>

extras/NetworkGraphicsDemo/NetworkGraphicsDemo.jucer

@@ -130,7 +130,7 @@
                    androidCpp11="1" targetFolder="Builds/Android" androidSDKPath=""
                    androidNDKPath="" bigIcon="Ww6bQw" gradleToolchainVersion="3.6">
       <CONFIGURATIONS>
-        <CONFIGURATION name="Debug" androidArchitectures="armeabi armeabi-v7a x86" isDebug="1"
+        <CONFIGURATION name="Debug" androidArchitectures="armeabi-v7a x86" isDebug="1"
                        optimisation="6" targetName="JUCE Network Graphics Demo" defines="JUCE_DEBUG=0"/>
         <CONFIGURATION name="Release" androidArchitectures="" isDebug="0" targetName="JUCE Network Graphics Demo"/>
       </CONFIGURATIONS>