FindSDL: Restore accidentally dropped search paths (#13651)

Cleanup in commit 9ed24c53 (FindSDL: Remove from find_... calls PATHS
that are set by default, 2012-09-04) accidentally dropped some search
paths.  Restore the dropped PATH_SUFFIXES and add more suffixes needed
to search paths that were previously hard-coded.

Reported-by: Gino van den Bergen <[email protected]>

Modules/FindSDL.cmake

@@ -70,7 +70,7 @@
 find_path(SDL_INCLUDE_DIR SDL.h
   HINTS
     ENV SDLDIR
-  PATH_SUFFIXES SDL SDL12 SDL11
+  PATH_SUFFIXES include/SDL include/SDL12 include/SDL11 include
 )
 
 # SDL-1.1 is the name used by FreeBSD ports...
@@ -79,6 +79,7 @@ find_library(SDL_LIBRARY_TEMP
   NAMES SDL SDL-1.1
   HINTS
     ENV SDLDIR
+  PATH_SUFFIXES lib
 )
 
 if(NOT SDL_BUILDING_LIBRARY)