Bluetooth: Fix not clearing signaled flag for conn_change signal
Bluetooth: Fix not clearing signaled flag for conn_change signal

From k_poll_signal_init() documentation:
The poll signal contains a 'signaled' field that, when set by
k_poll_signal(), stays set until the user sets it back to 0. It thus
has to be reset by the user before being passed again to k_poll() or
k_poll() will consider it being signaled, and will return immediately.

Change-Id: I55daac92dd6293ac653fd7fa0f907b0b7fd99d65
Signed-off-by: Szymon Janc <db186c297188f7acbbdc9bbd6aff2f45665bb42d@codecoup.pl>

Vudentz/zephyr,fractalclone/zephyr-riscv,Vudentz/zephyr,punitvara/zephyr,nashif/zephyr,zephyriot/zephyr,nashif/zephyr,explora26/zephyr,runchip/zephyr-cc3200,bboozzoo/zephyr,holtmann/zephyr,Vudentz/zephyr,nashif/zephyr,fractalclone/zephyr-riscv,rsalveti/zephyr,fractalclone/zephyr-riscv,mbolivar/zephyr,sharronliu/zephyr,mbolivar/zephyr,ldts/zephyr,runchip/zephyr-cc3220,pklazy/zephyr,pklazy/zephyr,GiulianoFranchetto/zephyr,explora26/zephyr,aceofall/zephyr-iotos,bigdinotech/zephyr,runchip/zephyr-cc3200,fbsder/zephyr,sharronliu/zephyr,zephyrproject-rtos/zephyr,GiulianoFranchetto/zephyr,punitvara/zephyr,kraj/zephyr,bboozzoo/zephyr,explora26/zephyr,explora26/zephyr,erwango/zephyr,finikorg/zephyr,tidyjiang8/zephyr-doc,GiulianoFranchetto/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,runchip/zephyr-cc3220,zephyrproject-rtos/zephyr,runchip/zephyr-cc3220,zephyriot/zephyr,zephyrproject-rtos/zephyr,Vudentz/zephyr,runchip/zephyr-cc3220,galak/zephyr,fbsder/zephyr,sharronliu/zephyr,finikorg/zephyr,finikorg/zephyr,sharronliu/zephyr,bigdinotech/zephyr,galak/zephyr,holtmann/zephyr,runchip/zephyr-cc3220,explora26/zephyr,zephyriot/zephyr,fbsder/zephyr,runchip/zephyr-cc3200,aceofall/zephyr-iotos,fractalclone/zephyr-riscv,finikorg/zephyr,ldts/zephyr,pklazy/zephyr,zephyriot/zephyr,Vudentz/zephyr,ldts/zephyr,erwango/zephyr,holtmann/zephyr,nashif/zephyr,nashif/zephyr,kraj/zephyr,galak/zephyr,erwango/zephyr,finikorg/zephyr,aceofall/zephyr-iotos,galak/zephyr,fbsder/zephyr,bboozzoo/zephyr,runchip/zephyr-cc3200,erwango/zephyr,punitvara/zephyr,bigdinotech/zephyr,tidyjiang8/zephyr-doc,ldts/zephyr,mbolivar/zephyr,pklazy/zephyr,rsalveti/zephyr,tidyjiang8/zephyr-doc,holtmann/zephyr,punitvara/zephyr,tidyjiang8/zephyr-doc,ldts/zephyr,fractalclone/zephyr-riscv,sharronliu/zephyr,GiulianoFranchetto/zephyr,Vudentz/zephyr,kraj/zephyr,rsalveti/zephyr,erwango/zephyr,bigdinotech/zephyr,holtmann/zephyr,runchip/zephyr-cc3200,kraj/zephyr,kraj/zephyr,GiulianoFranchetto/zephyr,punitvara/zephyr,bboozzoo/zephyr,mbolivar/zephyr,zephyrproject-rtos/zephyr,fbsder/zephyr,mbolivar/zephyr,zephyriot/zephyr,aceofall/zephyr-iotos,bigdinotech/zephyr,rsalveti/zephyr,tidyjiang8/zephyr-doc,bboozzoo/zephyr,rsalveti/zephyr,pklazy/zephyr,aceofall/zephyr-iotos