Update XAVersionInfo.targets

Author: jonathanpeppers

build-tools/scripts/XAVersionInfo.targets

@@ -40,6 +40,7 @@
       <Output TaskParameter="Commits"                 ItemName="_XAVersionCommit" />
     </GitBlame>
     <GitCommitsInRange
+        ContinueOnError="true"
         StartCommit="%(_XAVersionCommit.CommitHash)"
         WorkingDirectory="$(XamarinAndroidSourcePath)"
         ToolPath="$(GitToolPath)"
@@ -55,6 +56,7 @@
       <Output TaskParameter="Commits"                 ItemName="_PackVersionCommit" />
     </GitBlame>
     <GitCommitsInRange
+        ContinueOnError="true"
         StartCommit="%(_PackVersionCommit.CommitHash)"
         WorkingDirectory="$(XamarinAndroidSourcePath)"
         ToolPath="$(GitToolPath)"