lib/libc: add logbuffer function. [1/4]

PD#SWPL-82644

Problem:
fix t7 log conflict

Solution:
log dump to ram

Verify:
N/A

Signed-off-by: shijie.xiong <shijie.xiong@amlogic.com>
Change-Id: I7bf096177bbcacaf2423c53bca4e065770992fb7
8 files changed
tree: 642eb458baba9559dbf62b4ac40bb5390533a2f4
  1. aml/
  2. logbuffer/
  3. newlib/
  4. CMakeLists.txt
  5. Kconfig