Bump mono to 5.4.0.0

.gitmodules

@@ -5,7 +5,7 @@
 [submodule "external/mono"]
 	path = external/mono
 	url = https://github.com/mono/mono.git
-	branch = 2017-04
+	branch = 2017-06
 [submodule "external/mxe"]
 	path = external/mxe
 	url = https://github.com/xamarin/mxe.git
@@ -39,4 +39,4 @@
 [submodule "xamarin-android-api-compatibility"]
 	path = external/xamarin-android-api-compatibility
 	url = https://github.com/xamarin/xamarin-android-api-compatibility.git
-	branch = d15-4
+	branch = master

Configuration.props

@@ -53,8 +53,8 @@
     <JavaInteropSourceDirectory Condition=" '$(JavaInteropSourceDirectory)' == '' ">$(MSBuildThisFileDirectory)external\Java.Interop</JavaInteropSourceDirectory>
     <LlvmSourceDirectory Condition=" '$(LlvmSourceDirectory)' == '' ">$(MSBuildThisFileDirectory)external\llvm</LlvmSourceDirectory>
     <MonoSourceDirectory>$(MSBuildThisFileDirectory)external\mono</MonoSourceDirectory>
-    <MonoRequiredMinimumVersion Condition=" '$(MonoRequiredMinimumVersion)' == '' ">5.2.0</MonoRequiredMinimumVersion>
-    <MonoRequiredDarwinMinimumVersion>$(MonoRequiredMinimumVersion).114</MonoRequiredDarwinMinimumVersion>
+    <MonoRequiredMinimumVersion Condition=" '$(MonoRequiredMinimumVersion)' == '' ">5.4.0</MonoRequiredMinimumVersion>
+    <MonoRequiredDarwinMinimumVersion>$(MonoRequiredMinimumVersion).147</MonoRequiredDarwinMinimumVersion>
     <LinkerSourceDirectory>$(MSBuildThisFileDirectory)external\linker</LinkerSourceDirectory>
     <OpenTKSourceDirectory>$(MSBuildThisFileDirectory)external\opentk</OpenTKSourceDirectory>
     <LibZipSourceDirectory Condition=" '$(LibZipSourceDirectory)' == '' ">$(MSBuildThisFileDirectory)external\libzip</LibZipSourceDirectory>

build-tools/dependencies/dependencies.projitems

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
-    <_DarwinMonoFramework>MonoFramework-MDK-5.2.0.114.macos10.xamarin.universal.pkg</_DarwinMonoFramework>
+    <_DarwinMonoFramework>MonoFramework-MDK-5.4.0.147.macos10.xamarin.universal.pkg</_DarwinMonoFramework>
     <_AptGetInstall>apt-get -f -u install</_AptGetInstall>
   </PropertyGroup>
   <ItemGroup>
@@ -58,7 +58,7 @@
       <MinimumVersion>$(MonoRequiredMinimumVersion)</MinimumVersion>
       <DarwinMinimumVersion>$(MonoRequiredDarwinMinimumVersion)</DarwinMinimumVersion>
       <CurrentVersionCommand>$(MSBuildThisFileDirectory)..\scripts\mono-version</CurrentVersionCommand>
-      <DarwinMinimumUrl>https://bosstoragemirror.blob.core.windows.net/wrench/mono-2017-04/8a/8a4958ae3861143b55981cef3843c328462041f8/$(_DarwinMonoFramework)</DarwinMinimumUrl>
+      <DarwinMinimumUrl>https://bosstoragemirror.blob.core.windows.net/wrench/mono-2017-06/28/28a417c2c0d1a2d1231d8b0a5beea3201208b57d/$(_DarwinMonoFramework)</DarwinMinimumUrl>
       <DarwinInstall>installer -pkg "$(AndroidToolchainCacheDirectory)\$(_DarwinMonoFramework)" -target /</DarwinInstall>
     </RequiredProgram>
   </ItemGroup>