ENH: use wxFont::AddPrivateFont to load fonts for linux

Change-Id: Iefe1753a08fd188a274b4d555c5fcda8fca6d719

deps/wxWidgets/wxWidgets.cmake

@@ -7,6 +7,9 @@ if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
         set(_gtk_ver 3)
     endif ()
     set(_wx_toolkit "-DwxBUILD_TOOLKIT=gtk${_gtk_ver}")
+    set(_wx_private_font "-DwxUSE_PRIVATE_FONTS=1")
+else ()
+    set(_wx_private_font "-DwxUSE_PRIVATE_FONTS=0")
 endif()
 
 if (MSVC)
@@ -30,6 +33,7 @@ bambustudio_add_cmake_project(wxWidgets
         -DwxUSE_MEDIACTRL=ON
         -DwxUSE_DETECT_SM=OFF
         -DwxUSE_UNICODE=ON
+        ${_wx_private_font}
         -DwxUSE_OPENGL=ON
         -DwxUSE_WEBVIEW=ON
         ${_wx_edge}