New app: Spectrum Painter (#988)

* added spectrum painter app

firmware/baseband/CMakeLists.txt

@@ -140,6 +140,7 @@ set(CPPSRC
 	debug.cpp
 	${COMMON}/gcc.cpp
 	${COMMON}/performance_counter.cpp
+	${COMMON}/random.cpp
 	tone_gen.cpp
 )
 
@@ -463,6 +464,13 @@ set(MODE_CPPSRC
 )
 DeclareTargets(PSIG siggen)
 
+### Spectrum painter
+
+set(MODE_CPPSRC
+	proc_spectrum_painter.cpp
+)
+DeclareTargets(PSPT spectrum_painter)
+
 ### SSTV TX
 
 set(MODE_CPPSRC