Add missing tests to Windows build.

Author: asfernandes

builds/win32/msvc15/common_test.vcxproj

@@ -177,6 +177,8 @@
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="..\..\..\src\common\tests\CommonTest.cpp" />
+    <ClCompile Include="..\..\..\src\common\tests\CvtTest.cpp" />
+    <ClCompile Include="..\..\..\src\common\tests\StringTest.cpp" />
     <ClCompile Include="..\..\..\src\common\classes\tests\AlignerTest.cpp" />
     <ClCompile Include="..\..\..\src\common\classes\tests\ArrayTest.cpp" />
     <ClCompile Include="..\..\..\src\common\classes\tests\DoublyLinkedListTest.cpp" />

builds/win32/msvc15/common_test.vcxproj.filters

@@ -18,6 +18,12 @@
     <ClCompile Include="..\..\..\src\common\tests\CommonTest.cpp">
       <Filter>source</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\src\common\tests\CvtTest.cpp">
+      <Filter>source</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\src\common\tests\StringTest.cpp">
+      <Filter>source</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\src\common\classes\tests\AlignerTest.cpp">
       <Filter>source</Filter>
     </ClCompile>