cleanup automake files.

Signed-off-by: Haifeng Yan <haifeng.yan@linaro.org>
remove common include files.

Signed-off-by: Haifeng Yan <haifeng.yan@linaro.org>
Makefile.am: install the header files.

Signed-off-by: Haifeng Yan <haifeng.yan@linaro.org>