FindSDL_...: Restore dropped search paths (#13819)

Restore the search paths that were accidentally dropped by me in commit
9ed24c53. This was already fixed for FindSDL.cmake in commit 7cb51739.

Modules/FindSDL_image.cmake

@@ -40,7 +40,7 @@ find_path(SDL_IMAGE_INCLUDE_DIR SDL_image.h
   HINTS
     ENV SDLIMAGEDIR
     ENV SDLDIR
-  PATH_SUFFIXES SDL SDL12 SDL11
+  PATH_SUFFIXES include/SDL include/SDL12 include/SDL11 include
 )
 
 if(NOT SDL_IMAGE_LIBRARY AND SDLIMAGE_LIBRARY)
@@ -52,6 +52,7 @@ find_library(SDL_IMAGE_LIBRARY
   HINTS
     ENV SDLIMAGEDIR
     ENV SDLDIR
+  PATH_SUFFIXES lib
 )
 
 if(SDL_IMAGE_INCLUDE_DIR AND EXISTS "${SDL_IMAGE_INCLUDE_DIR}/SDL_image.h")

Modules/FindSDL_mixer.cmake

@@ -40,7 +40,7 @@ find_path(SDL_MIXER_INCLUDE_DIR SDL_mixer.h
   HINTS
     ENV SDLMIXERDIR
     ENV SDLDIR
-  PATH_SUFFIXES SDL SDL12 SDL11
+  PATH_SUFFIXES include/SDL include/SDL12 include/SDL11 include
 )
 
 if(NOT SDL_MIXER_LIBRARY AND SDLMIXER_LIBRARY)
@@ -52,6 +52,7 @@ find_library(SDL_MIXER_LIBRARY
   HINTS
     ENV SDLMIXERDIR
     ENV SDLDIR
+  PATH_SUFFIXES lib
 )
 
 if(SDL_MIXER_INCLUDE_DIR AND EXISTS "${SDL_MIXER_INCLUDE_DIR}/SDL_mixer.h")

Modules/FindSDL_net.cmake

@@ -40,7 +40,7 @@ find_path(SDL_NET_INCLUDE_DIR SDL_net.h
   HINTS
     ENV SDLNETDIR
     ENV SDLDIR
-  PATH_SUFFIXES SDL SDL12 SDL11
+  PATH_SUFFIXES include/SDL include/SDL12 include/SDL11 include
 )
 
 if(NOT SDL_NET_LIBRARY AND SDLNET_LIBRARY)
@@ -52,6 +52,7 @@ find_library(SDL_NET_LIBRARY
   HINTS
     ENV SDLNETDIR
     ENV SDLDIR
+  PATH_SUFFIXES lib
 )
 
 if(SDL_NET_INCLUDE_DIR AND EXISTS "${SDL_NET_INCLUDE_DIR}/SDL_net.h")

Modules/FindSDL_sound.cmake

@@ -77,7 +77,7 @@ find_path(SDL_SOUND_INCLUDE_DIR SDL_sound.h
   HINTS
     ENV SDLSOUNDDIR
     ENV SDLDIR
-  PATH_SUFFIXES SDL SDL12 SDL11
+  PATH_SUFFIXES include/SDL include/SDL12 include/SDL11 include
   )
 
 find_library(SDL_SOUND_LIBRARY
@@ -85,6 +85,7 @@ find_library(SDL_SOUND_LIBRARY
   HINTS
     ENV SDLSOUNDDIR
     ENV SDLDIR
+  PATH_SUFFIXES lib
   )
 
 if(SDL_FOUND AND SDL_SOUND_INCLUDE_DIR AND SDL_SOUND_LIBRARY)

Modules/FindSDL_ttf.cmake

@@ -40,7 +40,7 @@ find_path(SDL_TTF_INCLUDE_DIR SDL_ttf.h
   HINTS
     ENV SDLTTFDIR
     ENV SDLDIR
-  PATH_SUFFIXES SDL SDL12 SDL11
+  PATH_SUFFIXES include/SDL include/SDL12 include/SDL11 include
 )
 
 if(NOT SDL_TTF_LIBRARY AND SDLTTF_LIBRARY)
@@ -52,6 +52,7 @@ find_library(SDL_TTF_LIBRARY
   HINTS
     ENV SDLTTFDIR
     ENV SDLDIR
+  PATH_SUFFIXES lib
 )
 
 if(SDL_TTF_INCLUDE_DIR AND EXISTS "${SDL_TTF_INCLUDE_DIR}/SDL_ttf.h")