This patch combine three patch which is related to "--gcov" flag.

This patch combine three patch which is related to "--gcov" flag.

First patch provides an option to enable gcov for Tizen target and
change to build with gcc when given "--gcov" option.

In second patch we change "gcov" option value for SR QB
Refer to SR Tizen Build macro in [0].
The value of the variable should be "1" to enable gcov.

In third patch we change "gcov" option value in spec file
Change the value for SR QB

References:
https://review.tizen.org/gerrit/290776
https://review.tizen.org/gerrit/292688
https://review.tizen.org/gerrit/293899

Change-Id: Iccc9042fb4c4a373bdd1777b77e1b97d95651d03