Add demo
Revise the path
initial experiment

Signed-off-by: Jim Huang <jserv@0xlab.org>
Add .gitignore
改由 gdb 宣告記憶體位置

Signed-off-by: Jim Huang <jserv@0xlab.org>
修正記憶體配置

Signed-off-by: Jim Huang <jserv@0xlab.org>
add gdbauto in demo/Makefile

Signed-off-by: Jim Huang <jserv@0xlab.org>
Disable QEMU monitor while gdbauto mode
Add author information
modified the gdb script (gdb.in)

Added new functon:
*Save the characters of USART function (gdb script) into a txt file (gdb.txt)
improved the implementation of gdb script

Modified:
*Added echo_char(MACRO) to replace the function which wrote in last version
(Save the characters of USART function (gdb script) into a txt file (gdb.txt))
added the shell script for checking gdb.txt