Fix QuickLook.Common snupkg publishing failed

Symbols package publishing failed. The associated symbols package could not be published due to the following reason(s):
The uploaded symbols package contains one or more pdbs that are not portable.
Once you've fixed the issue with your symbols package, you can re-upload it.

QuickLook.Common/QuickLook.Common.csproj

@@ -26,7 +26,7 @@
 
     <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|AnyCPU'">
         <DebugSymbols>true</DebugSymbols>
-        <DebugType>full</DebugType>
+        <DebugType>portable</DebugType>
         <Optimize>false</Optimize>
         <OutputPath>..\Build\Debug\</OutputPath>
         <DefineConstants>DEBUG;TRACE</DefineConstants>
@@ -35,7 +35,7 @@
 
     <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
         <DebugSymbols>true</DebugSymbols>
-        <DebugType>full</DebugType>
+        <DebugType>portable</DebugType>
         <Optimize>false</Optimize>
         <OutputPath>..\Build\Debug\</OutputPath>
         <DefineConstants>DEBUG;TRACE</DefineConstants>
@@ -43,7 +43,7 @@
     </PropertyGroup>
 
     <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Release|AnyCPU'">
-        <DebugType>pdbonly</DebugType>
+        <DebugType>portable</DebugType>
         <Optimize>true</Optimize>
         <OutputPath>..\Build\Release\</OutputPath>
         <DefineConstants>TRACE</DefineConstants>
@@ -51,7 +51,7 @@
     </PropertyGroup>
 
     <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
-        <DebugType>pdbonly</DebugType>
+        <DebugType>portable</DebugType>
         <Optimize>true</Optimize>
         <OutputPath>..\Build\Release\</OutputPath>
         <DefineConstants>TRACE</DefineConstants>