refactor: GGML_VULKAN_SHADERS_GEN_TOOLCHAIN

Rename the macro GGML_SHADERS_GEN_TOOLCHAIN to GGML_VULKAN_SHADERS_GEN_TOOLCHAIN

Author: sparkleholic

ggml/CMakeLists.txt

@@ -186,7 +186,7 @@ option(GGML_OPENCL_EMBED_KERNELS            "ggml: embed kernels"
 option(GGML_OPENCL_USE_ADRENO_KERNELS       "ggml: use optimized kernels for Adreno"          ON)
 
 # toolchain for vulkan-shaders-gen
-set   (GGML_SHADERS_GEN_TOOLCHAIN "" CACHE FILEPATH "ggml: toolchain file for vulkan-shaders-gen")
+set   (GGML_VULKAN_SHADERS_GEN_TOOLCHAIN "" CACHE FILEPATH "ggml: toolchain file for vulkan-shaders-gen")
 
 # extra artifacts
 option(GGML_BUILD_TESTS    "ggml: build tests"    ${GGML_STANDALONE})

ggml/src/ggml-vulkan/CMakeLists.txt

@@ -98,8 +98,8 @@ if (Vulkan_FOUND)
             endforeach()
         endif()
     else()
-        if (GGML_SHADERS_GEN_TOOLCHAIN)
-            set(HOST_CMAKE_TOOLCHAIN_FILE ${GGML_SHADERS_GEN_TOOLCHAIN})
+        if (GGML_VULKAN_SHADERS_GEN_TOOLCHAIN)
+            set(HOST_CMAKE_TOOLCHAIN_FILE ${GGML_VULKAN_SHADERS_GEN_TOOLCHAIN})
         else()
             detect_host_compiler()
             if (NOT HOST_C_COMPILER OR NOT HOST_CXX_COMPILER)