[qca-nss-clients] Remove __TIME__ __DATE__ macros

GCC 4.9 and newer have turn on -Werror=date-time, which errors on
use of __DATE__, __TIME__, or __TIMESTAMP__, which would increase
reproducibility.

- Remove __DATE__ and __TIME__ macro
- Take host build system's time in cflag and use that instead

Change-Id: I240292a12408542d818112d42f5f05bfc3ca4684
Signed-off-by: Ram Chandra Jangir <rjangi@codeaurora.org>
11 files changed