add pico_multi_booter code

Code/pico_multi_booter/picomite/xregex.h

@@ -0,0 +1,34 @@
+/* 
+ * @cond
+ * The following section will be excluded from the documentation.
+ */
+/* This file redefines all regex external names before including
+   a renamed copy of glibc's regex.h.  */
+
+#ifndef _XREGEX_H
+#define _XREGEX_H 1
+
+#  define regfree xregfree 
+#  define regexec xregexec
+#  define regcomp xregcomp
+#  define regerror xregerror
+#  define regoff_t xregoff_t
+#  define re_set_registers xre_set_registers
+#  define re_match_2 xre_match_2
+#  define re_match xre_match
+#  define re_search xre_search
+#  define re_compile_pattern xre_compile_pattern
+#  define re_set_syntax xre_set_syntax
+#  define re_search_2 xre_search_2
+#  define re_compile_fastmap xre_compile_fastmap
+#  define re_syntax_options xre_syntax_options
+#  define re_max_failures xre_max_failures
+
+#  define _REGEX_RE_COMP
+#  define re_comp xre_comp
+#  define re_exec xre_exec
+
+#include "xregex2.h"
+
+#endif /* xregex.h */
+/*  @endcond */