GDB now is standalone tool separated from toolchain due to frequent updates.
Added installation tests for the new tool.
Tests are changed because they were wrong, see explanation:
esp32 objdump:
40084290 <esp_crosscore_int_send_yield>:
......
/builds/espressif/esp-idf/components/esp_system/crosscore_int.c:145
4008429c: 000090 retw
With previous GDB backtrace was:
#0 0x4008429c in esp_crosscore_int_send_yield (core_id=0) at /builds/espressif/esp-idf/components/esp_system/crosscore_int.c:144
This commit fixes the backtrace with the right line number:
#0 0x4008429c in esp_crosscore_int_send_yield (core_id=0) at /builds/espressif/esp-idf/components/esp_system/crosscore_int.c:145
Other tests changes have the same cause of fixing.
Closes https://github.com/espressif/esp-idf/issues/6334
