Merge pull request opencv#24274 from vrabaud:webp_1.3.2

Merge pull request opencv#24274 from vrabaud:webp_1.3.2
 
Bump libwebp to 1.3.2 opencv#24274

This is version [c1ffd9a](https://chromium.googlesource.com/webm/libwebp/+/c1ffd9ac7593894c40a1de99d03f0b7af8af2577)
It is 1.3.2 with a few patches that were made right after to help compilation.
No need for patches on the OpenCV side!

### Pull Request Readiness Checklist

See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request

- [x] I agree to contribute to the project under Apache 2 License.
- [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
- [x] The PR is proposed to the proper branch

3rdparty/libwebp/CMakeLists.txt

@@ -9,8 +9,8 @@ if(ANDROID)
   ocv_include_directories(${CPUFEATURES_INCLUDE_DIRS})
 endif()
 
-file(GLOB lib_srcs src/dec/*.c src/demux/*.c src/dsp/*.c src/enc/*.c src/mux/*.c src/utils/*.c src/webp/*.c)
-file(GLOB lib_hdrs src/dec/*.h src/demux/*.h src/dsp/*.h src/enc/*.h src/mux/*.h src/utils/*.h src/webp/*.h)
+file(GLOB lib_srcs sharpyuv/*.c src/dec/*.c src/demux/*.c src/dsp/*.c src/enc/*.c src/mux/*.c src/utils/*.c src/webp/*.c)
+file(GLOB lib_hdrs sharpyuv/*.h src/dec/*.h src/demux/*.h src/dsp/*.h src/enc/*.h src/mux/*.h src/utils/*.h src/webp/*.h)
 
 # FIXIT
 if(ANDROID AND ARMEABI_V7A AND NOT NEON)
@@ -21,12 +21,6 @@ if(ANDROID AND ARMEABI_V7A AND NOT NEON)
   endforeach()
 endif()
 
-# FIX for quant.h - requires C99 for() loops
-ocv_check_flag_support(C "-std=c99" _varname "${CMAKE_C_FLAGS}")
-if(${_varname})
-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=c99")
-endif()
-
 
 # ----------------------------------------------------------------------------------
 #         Define the library target: