[examples] Deduplicate hard_fault examples

Author: salkinium

examples/nucleo_f103rb/hard_fault/main.cpp renamed to examples/core/hard_fault/main.cpp

@@ -19,8 +19,6 @@ void function1(uint32_t bla)
 
 	if (Button::read()) {
 		// execute undefined instructed
-		// the hard fault handler will blink the blue LED
-		// or, if the debugger is connected, will trigger a breakpoint
 		asm volatile (".short 0xde00");
 	}
 }
@@ -69,9 +67,11 @@ main()
 
 	MODM_LOG_INFO << "Hold Button to cause a Hardfault!" << modm::endl;
 
+#ifdef CoreDebug_DHCSR_C_DEBUGEN_Msk
 	if (CoreDebug->DHCSR & CoreDebug_DHCSR_C_DEBUGEN_Msk) {
 		MODM_LOG_INFO << "Debugger connected!" << modm::endl;
 	}
+#endif
 
 	while (true)
 	{

examples/core/hard_fault/project.xml

@@ -0,0 +1,15 @@
+<library>
+  <extends>modm:nucleo-f072rb</extends>
+  <!-- <extends>modm:nucleo-f103rb</extends> -->
+  <!-- <extends>modm:nucleo-f446ze</extends> -->
+  <!-- <extends>modm:nucleo-f746zg</extends> -->
+  <!-- <extends>modm:nucleo-g071rb</extends> -->
+  <!-- <extends>modm:nucleo-h743zi</extends> -->
+  <!-- <extends>modm:nucleo-l552ze-q</extends> -->
+  <!-- <extends>modm:nucleo-u575zi-q</extends> -->
+  <modules>
+    <module>modm:platform:fault</module>
+    <module>modm:platform:heap</module>
+    <module>modm:build:scons</module>
+  </modules>
+</library>