Revert "Remove certs.h"

This reverts commit b8e4ae18cf24644fa8daea6add26ad33aa1e52a7.
diff --git a/visualc/VS2010/mbedTLS.vcxproj b/visualc/VS2010/mbedTLS.vcxproj
index 33121bf..8b771bf 100644
--- a/visualc/VS2010/mbedTLS.vcxproj
+++ b/visualc/VS2010/mbedTLS.vcxproj
@@ -162,6 +162,7 @@
     <ClInclude Include="..\..\include\mbedtls\bn_mul.h" />

     <ClInclude Include="..\..\include\mbedtls\camellia.h" />

     <ClInclude Include="..\..\include\mbedtls\ccm.h" />

+    <ClInclude Include="..\..\include\mbedtls\certs.h" />

     <ClInclude Include="..\..\include\mbedtls\chacha20.h" />

     <ClInclude Include="..\..\include\mbedtls\chachapoly.h" />

     <ClInclude Include="..\..\include\mbedtls\check_config.h" />