Do not activate cairo under Haiku for now

Signed-off-by: falkTX <falktx@falktx.com>

CMakeLists.txt

@@ -32,7 +32,7 @@ if(DPF_LIBRARIES)
   find_package(PkgConfig)
   if(PKG_CONFIG_FOUND)
     pkg_check_modules(CAIRO "cairo")
-    if(CAIRO_FOUND)
+    if(CAIRO_FOUND AND (NOT HAIKU))
       dpf__add_dgl_cairo(FALSE)
     endif()
   endif()
@@ -43,7 +43,7 @@ if(DPF_EXAMPLES)
   find_package(PkgConfig)
   if(PKG_CONFIG_FOUND)
     pkg_check_modules(CAIRO "cairo")
-    if(CAIRO_FOUND)
+    if(CAIRO_FOUND AND (NOT HAIKU))
       add_subdirectory("examples/CairoUI")
     endif()
   endif()