Update dependencies from https://github.com/dotnet/arcade build 20200121.3 (#6220)

- Microsoft.DotNet.Arcade.Sdk - 5.0.0-beta.20071.3

eng/Version.Details.xml

@@ -104,9 +104,9 @@
     </Dependency>
   </ProductDependencies>
   <ToolsetDependencies>
-    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="5.0.0-beta.20068.1">
+    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="5.0.0-beta.20071.3">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>ebc71292545adda514c1e6a5657cd9ab753240bc</Sha>
+      <Sha>e06e2807048b6bc7b3549b401a1833bed3bcd8c3</Sha>
     </Dependency>
   </ToolsetDependencies>
 </Dependencies>

eng/common/cross/build-rootfs.sh

@@ -25,8 +25,9 @@ __UbuntuPackages="build-essential"
 __AlpinePackages="alpine-base"
 __AlpinePackages+=" build-base"
 __AlpinePackages+=" linux-headers"
-__AlpinePackages+=" lldb-dev"
-__AlpinePackages+=" llvm-dev"
+__AlpinePackagesEdgeTesting=" lldb-dev"
+__AlpinePackagesEdgeMain=" llvm9-libs"
+__AlpinePackagesEdgeMain+=" python3"
 
 # symlinks fixer
 __UbuntuPackages+=" symlinks"
@@ -199,13 +200,23 @@ if [[ "$__LinuxCodeName" == "alpine" ]]; then
     tar -xf $__ApkToolsDir/apk-tools-$__ApkToolsVersion-x86_64-linux.tar.gz -C $__ApkToolsDir
     mkdir -p $__RootfsDir/usr/bin
     cp -v /usr/bin/qemu-$__QEMUArch-static $__RootfsDir/usr/bin
+
     $__ApkToolsDir/apk-tools-$__ApkToolsVersion/apk \
       -X http://dl-cdn.alpinelinux.org/alpine/v$__AlpineVersion/main \
       -X http://dl-cdn.alpinelinux.org/alpine/v$__AlpineVersion/community \
-      -X http://dl-cdn.alpinelinux.org/alpine/edge/testing \
-      -X http://dl-cdn.alpinelinux.org/alpine/edge/main \
       -U --allow-untrusted --root $__RootfsDir --arch $__AlpineArch --initdb \
       add $__AlpinePackages
+
+    $__ApkToolsDir/apk-tools-$__ApkToolsVersion/apk \
+      -X http://dl-cdn.alpinelinux.org/alpine/edge/main \
+      -U --allow-untrusted --root $__RootfsDir --arch $__AlpineArch --initdb \
+      add $__AlpinePackagesEdgeMain
+
+    $__ApkToolsDir/apk-tools-$__ApkToolsVersion/apk \
+      -X http://dl-cdn.alpinelinux.org/alpine/edge/testing \
+      -U --allow-untrusted --root $__RootfsDir --arch $__AlpineArch --initdb \
+      add $__AlpinePackagesEdgeTesting
+
     rm -r $__ApkToolsDir
 elif [[ -n $__LinuxCodeName ]]; then
     qemu-debootstrap --arch $__UbuntuArch $__LinuxCodeName $__RootfsDir $__UbuntuRepo

global.json

@@ -3,6 +3,6 @@
     "dotnet": "5.0.100-alpha1-015949"
   },
   "msbuild-sdks": {
-    "Microsoft.DotNet.Arcade.Sdk": "5.0.0-beta.20068.1"
+    "Microsoft.DotNet.Arcade.Sdk": "5.0.0-beta.20071.3"
   }
 }