riscv64 JIT/Wasm etc support isn't ready for prime time.

Index: Source/cmake/WebKitFeatures.cmake
--- Source/cmake/WebKitFeatures.cmake.orig
+++ Source/cmake/WebKitFeatures.cmake
@@ -106,12 +106,6 @@ macro(WEBKIT_OPTION_BEGIN)
         set(USE_SYSTEM_MALLOC_DEFAULT OFF)
         set(ENABLE_C_LOOP_DEFAULT ON)
         set(ENABLE_SAMPLING_PROFILER_DEFAULT OFF)
-    elseif (WTF_CPU_RISCV64)
-        set(ENABLE_JIT_DEFAULT ON)
-        set(ENABLE_FTL_DEFAULT ON)
-        set(USE_SYSTEM_MALLOC_DEFAULT OFF)
-        set(ENABLE_C_LOOP_DEFAULT OFF)
-        set(ENABLE_SAMPLING_PROFILER_DEFAULT OFF)
     else ()
         set(ENABLE_JIT_DEFAULT OFF)
         set(ENABLE_FTL_DEFAULT OFF)
@@ -457,7 +451,7 @@ macro(GET_WEBKIT_CONFIG_VARIABLES _var_name)
 endmacro()
 
 macro(WEBKIT_CHECK_HAVE_INCLUDE _variable _header)
-    check_include_file(${_header} ${_variable}_value)
+    check_include_files("${_header}" ${_variable}_value)
     SET_AND_EXPOSE_TO_BUILD(${_variable} ${${_variable}_value})
 endmacro()
 
