glib2.spec: Change -mimplicit-it option to ARM

glib2.spec: Change -mimplicit-it option to ARM

If -mimplicit-it option is set to thumb, then it will shows below warning logs.

[  135s] {standard input}:4839: Warning: conditional outside an IT block for Thumb.
[  135s] {standard input}:4850: Warning: conditional outside an IT block for Thumb.
[  135s] {standard input}:4872: Warning: conditional outside an IT block for Thumb.
[  135s] {standard input}:4899: Warning: conditional outside an IT block for Thumb.
[  135s] {standard input}:4973: Warning: conditional outside an IT block for Thumb.

Since output code was changed to ARM state ('switch compilation mode fom Thumb to ARM'),
-mimplicit-it option also should be changed to ARM mode.

Change-Id: I244f92313a89a70236c3a571847ab6bbd918d823
Signed-off-by: Jonghwa Lee <jonghwa3.lee@samsung.com>
(cherry picked from commit 231ca1b5b0e3a0d4ea2afea70cb3a6bd02d58150)