fixes for ios spirv tools

.patch/spirv-tools/0003-ios-fix.patch

@@ -0,0 +1,21 @@
+diff --git a/source/CMakeLists.txt b/source/CMakeLists.txt
+index 7ab2319..0d6b382 100644
+--- a/source/CMakeLists.txt
++++ b/source/CMakeLists.txt
+@@ -151,9 +151,6 @@ add_custom_command(OUTPUT ${SPIRV_TOOLS_BUILD_VERSION_INC}
+    COMMENT "Update build-version.inc in the SPIRV-Tools build directory (if necessary).")
+ # Convenience target for standalone generation of the build-version.inc file.
+ # This is not required for any dependence chain.
+-add_custom_target(spirv-tools-build-version
+-   DEPENDS ${SPIRV_TOOLS_BUILD_VERSION_INC})
+-set_property(TARGET spirv-tools-build-version PROPERTY FOLDER "SPIRV-Tools build")
+ 
+ list(APPEND PCH_DEPENDS
+        ${CORE_TABLES_HEADER_INC_FILE}
+@@ -339,7 +336,7 @@ function(spirv_tools_default_target_options target)
+   set_property(TARGET ${target} PROPERTY FOLDER "SPIRV-Tools libraries")
+   spvtools_check_symbol_exports(${target})
+   add_dependencies(${target}
+-    spirv-tools-build-version core_tables extinst_tables)
++    core_tables extinst_tables)
+ endfunction()

externals/cpmfile.json

@@ -110,7 +110,8 @@
         ],
         "patches": [
             "0001-netbsd-fix.patch",
-            "0002-allow-static-only.patch"
+            "0002-allow-static-only.patch",
+            "0003-ios-fix.patch"
         ]
     },
     "spirv-headers": {