cmake: Include .pdb in zips of debug builds.

Include the visualboyadvance-m.pdb file alongside the .exe for Visual
Studio debug builds.

Visual Studio generates this file with the debug symbols for debug
builds. The file is not generated for release builds. It is also
generated for RelWithDebInfo builds.

Signed-off-by: Rafael Kitover <rkitover@gmail.com>

src/wx/CMakeLists.txt

@@ -1048,10 +1048,16 @@ if(UPSTREAM_RELEASE AND WIN32)
 
     set(exezip visualboyadvance-m-Win-${BITS}bit.zip)
 
+    unset(pdb_file)
+
+    if(MSVC AND CMAKE_BUILD_TYPE MATCHES Debug)
+        set(pdb_file visualboyadvance-m.pdb)
+    endif()
+
     add_custom_command(
         TARGET visualboyadvance-m
         POST_BUILD
-        COMMAND ${ZIP_PROGRAM} -9 ${exezip} visualboyadvance-m.exe
+        COMMAND ${ZIP_PROGRAM} -9 ${exezip} visualboyadvance-m.exe ${pdb_file}
         WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
     )