Move "src/mrb_throw.h" to "include/mruby/throw.h".

Related to #2760.

include/mruby/throw.h

@@ -1,5 +1,5 @@
 /*
-** mrb_throw.h - mruby exception throwing handler
+** mruby/throw.h - mruby exception throwing handler
 **
 ** See Copyright Notice in mruby.h
 */

src/codegen.c

@@ -17,7 +17,7 @@
 #include "node.h"
 #include "mruby/opcode.h"
 #include "mruby/re.h"
-#include "mrb_throw.h"
+#include "mruby/throw.h"
 
 typedef mrb_ast_node node;
 typedef struct mrb_parser_state parser_state;

src/error.c

@@ -16,7 +16,7 @@
 #include "mruby/debug.h"
 #include "mruby/error.h"
 #include "mruby/class.h"
-#include "mrb_throw.h"
+#include "mruby/throw.h"
 
 MRB_API mrb_value
 mrb_exc_new(mrb_state *mrb, struct RClass *c, const char *ptr, size_t len)

src/parse.y

@@ -27,7 +27,7 @@
 #include "mruby/proc.h"
 #include "mruby/error.h"
 #include "node.h"
-#include "mrb_throw.h"
+#include "mruby/throw.h"
 
 #define YYLEX_PARAM p
 

src/vm.c

@@ -20,7 +20,7 @@
 #include "mruby/error.h"
 #include "mruby/opcode.h"
 #include "value_array.h"
-#include "mrb_throw.h"
+#include "mruby/throw.h"
 
 #ifndef ENABLE_STDIO
 #if defined(__cplusplus)