ADD: added a lot of ic ids to cmdhf15.c Thanks to Asper for the list.

ADD: added a manufacturer list in "hf 14a reader",  only viable when UID is double or triple size.  Thanks to Asper for the list.
ADD: detect chinese magic backdoor commands in "hf 14a reader"
CHG: minor code clean up.

armsrc/string.h

@@ -19,6 +19,7 @@ int strlen(const char *str);
 RAMFUNC void *memcpy(void *dest, const void *src, int len);
 void *memset(void *dest, int c, int len);
 RAMFUNC int memcmp(const void *av, const void *bv, int len);
+void memxor(uint8_t * dest, uint8_t * src, size_t len);
 char *strncat(char *dest, const char *src, unsigned int n);
 char *strcat(char *dest, const char *src);
 void strreverse(char s[]);