package/sdl2: update SDL2_CPE_ID_PRODUCT

package/sdl2: update SDL2_CPE_ID_PRODUCT

libsdl:sdl has been replaced by libsdl:simple_directmedia_layer:
  https://nvd.nist.gov/products/cpe/search/results?namingFormat=2.3&keyword=cpe%3A2.3%3Aa%3Alibsdl%3Asimple_directmedia_layer

  <cpe-item name="cpe:/a:libsdl:sdl:2.0.12" deprecated="true" deprecation_date="2021-02-08T18:56:07.243Z">
      <reference href="https://www.libsdl.org/release/">Version</reference>
    <cpe-23:cpe23-item name="cpe:2.3:a:libsdl:sdl:2.0.12:*:*:*:*:*:*:*">
        <cpe-23:deprecated-by name="cpe:2.3:a:libsdl:simple_directmedia_layer:2.0.12:*:*:*:*:*:*:*" type="NAME_CORRECTION"/>

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>