SITL: changed posix_default to posix_sitl

The SITL build is now the default posix build.

The linker script for posix was moved to makefiles/posix.
The rc.S file was moved to posix-configs/SITL/init/
The POSIXTEST board definition is now SITL

To run the SITL test run:

make sitlrun

This replaces the make posixrun target.

The build directory is now Build/posix_sitl.build/

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

posix-configs/SITL/init/rc.S

@@ -0,0 +1,47 @@
+uorb start
+param load
+mavlink start -u 14556
+simulator start -s
+param set CAL_GYRO0_ID 2293760
+param set CAL_ACC0_ID 1310720
+param set CAL_ACC1_ID 1376256
+param set CAL_MAG0_ID 196608
+rgbled start
+tone_alarm start
+gyrosim start
+accelsim start
+barosim start
+adcsim start
+commander start
+sensors start
+ekf_att_pos_estimator start
+mc_pos_control start
+mc_att_control start
+hil mode_pwm
+dataman start
+navigator start
+param set MAV_TYPE 2
+param set RC1_MAX 2015
+param set RC1_MIN 996
+param set RC1_TRIM 1502
+param set RC1_REV -1
+param set RC2_MAX 2016 
+param set RC2_MIN 995
+param set RC2_TRIM 1500
+param set RC3_MAX 2003
+param set RC3_MIN 992
+param set RC3_TRIM 992
+param set RC4_MAX 2011
+param set RC4_MIN 997
+param set RC4_TRIM 1504
+param set RC4_REV -1
+param set RC6_MAX 2016
+param set RC6_MIN 992
+param set RC6_TRIM 1504
+param set RC_CHAN_CNT 8
+param set RC_MAP_MODE_SW 5
+param set RC_MAP_POSCTL_SW 7
+param set RC_MAP_RETURN_SW 8
+param set MC_PITCHRATE_P 0.05
+param set MC_ROLLRATE_P 0.05
+mixer load /dev/pwm_output0 ../../ROMFS/px4fmu_common/mixers/quad_x.main.mix