Fix copying library contents (#159)

***NO_CI***

Author: josesimoes

nanoFirmwareFlasher.Library/nanoFirmwareFlasher.Library.csproj

@@ -33,7 +33,7 @@
         <ItemGroup>
             <LibSourceFiles Include="$(MSBuildThisFileDirectory)\..\lib\**\*.*" />
         </ItemGroup>
-        <Copy SourceFiles="@(LibSourceFiles)" DestinationFiles="$(TargetDir)\%(RecursiveDir)%(Filename)%(Extension)" SkipUnchangedFiles="True" />
+        <Copy SourceFiles="@(LibSourceFiles)" DestinationFiles="$(TargetDir)\%(RecursiveDir)%(Filename)%(Extension)" SkipUnchangedFiles="True" Condition="$(TargetDir) != ''" />
 	</Target>
 
   <ItemGroup>

nanoFirmwareFlasher.Library/nanoFramework.Tools.FirmwareFlasher.targets

@@ -3,6 +3,6 @@
     <ItemGroup>
       <LibSourceFiles Include="$(PkgnanoFramework_Tools_FirmwareFlasher)\tools\any\**\*.*"/>
     </ItemGroup>
-    <Copy SourceFiles="@(LibSourceFiles)" DestinationFiles="$(TargetDir)\%(RecursiveDir)%(Filename)%(Extension)" SkipUnchangedFiles="True" />
+    <Copy SourceFiles="@(LibSourceFiles)" DestinationFiles="$(TargetDir)\%(RecursiveDir)%(Filename)%(Extension)" SkipUnchangedFiles="True" Condition="$(TargetDir) != ''"/>
   </Target>
 </Project>

nanoFirmwareFlasher.Tool/nanoFirmwareFlasher.Tool.csproj

@@ -66,7 +66,7 @@
 	    <ItemGroup>
             <LibSourceFiles Include="$(MSBuildThisFileDirectory)\..\lib\**\*.*" />
         </ItemGroup>
-        <Copy SourceFiles="@(LibSourceFiles)" DestinationFiles="$(TargetDir)\%(RecursiveDir)%(Filename)%(Extension)" SkipUnchangedFiles="True" />
+        <Copy SourceFiles="@(LibSourceFiles)" DestinationFiles="$(TargetDir)\%(RecursiveDir)%(Filename)%(Extension)" SkipUnchangedFiles="True" Condition="$(TargetDir) != ''"/>
 	</Target>
 
 	<PropertyGroup>