vulkan: Fix missing cmake logic for dot product extension (#12721)

ggml/src/ggml-vulkan/CMakeLists.txt

@@ -64,8 +64,10 @@ if (Vulkan_FOUND)
 
     if (${glslc_error} MATCHES ".*extension not supported: GL_EXT_integer_dot_product.*")
         message(STATUS "GL_EXT_integer_dot_product not supported by glslc")
+        set(GGML_VULKAN_INTEGER_DOT_GLSLC_SUPPORT OFF)
     else()
         message(STATUS "GL_EXT_integer_dot_product supported by glslc")
+        set(GGML_VULKAN_INTEGER_DOT_GLSLC_SUPPORT ON)
         add_compile_definitions(GGML_VULKAN_INTEGER_DOT_GLSLC_SUPPORT)
     endif()
 
@@ -139,6 +141,7 @@ if (Vulkan_FOUND)
                     -DCMAKE_INSTALL_PREFIX=${CMAKE_BINARY_DIR}
                     -DGGML_VULKAN_COOPMAT_GLSLC_SUPPORT=${GGML_VULKAN_COOPMAT_GLSLC_SUPPORT}
                     -DGGML_VULKAN_COOPMAT2_GLSLC_SUPPORT=${GGML_VULKAN_COOPMAT2_GLSLC_SUPPORT}
+                    -DGGML_VULKAN_INTEGER_DOT_GLSLC_SUPPORT=${GGML_VULKAN_INTEGER_DOT_GLSLC_SUPPORT}
             BUILD_COMMAND ${CMAKE_COMMAND} --build .
             INSTALL_COMMAND ${CMAKE_COMMAND} --install .
             INSTALL_DIR ${CMAKE_BINARY_DIR}

ggml/src/ggml-vulkan/vulkan-shaders/CMakeLists.txt

@@ -6,6 +6,9 @@ endif()
 if (GGML_VULKAN_COOPMAT2_GLSLC_SUPPORT)
     add_compile_definitions(GGML_VULKAN_COOPMAT2_GLSLC_SUPPORT)
 endif()
+if (GGML_VULKAN_INTEGER_DOT_GLSLC_SUPPORT)
+    add_compile_definitions(GGML_VULKAN_INTEGER_DOT_GLSLC_SUPPORT)
+endif()
 set(TARGET vulkan-shaders-gen)
 add_executable(${TARGET} vulkan-shaders-gen.cpp)
 install(TARGETS ${TARGET} RUNTIME)