Add patches for ruby source tree

patches/ruby/unused_param.patch

@@ -0,0 +1,25 @@
+diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h
+index 0a8407a..22dff42 100644
+--- a/include/ruby/ruby.h
++++ b/include/ruby/ruby.h
+@@ -1207,6 +1207,9 @@ rb_obj_wb_unprotect(VALUE x, const char *filename, int line)
+     RGENGC_LOGGING_WB_UNPROTECT((void *)x, filename, line);
+ #endif
+ 
++	(void) filename;
++	(void) line;
++
+ #if USE_RGENGC
+     /* `x' should be an RVALUE object */
+     if (FL_TEST_RAW((x), FL_WB_PROTECTED)) {
+@@ -1227,6 +1230,10 @@ rb_obj_written(VALUE a, VALUE oldv, VALUE b, const char *filename, int line)
+     RGENGC_LOGGING_OBJ_WRITTEN(a, oldv, b, filename, line);
+ #endif
+ 
++	(void) oldv;
++	(void) filename;
++	(void) line;
++
+ #if USE_RGENGC
+     /* `a' should be an RVALUE object */
+     if (FL_TEST_RAW((a), FL_OLDGEN) &&