move crt0 to libnx

Makefile

@@ -1,12 +1,9 @@
 all:
-	$(MAKE) -C crt0/
 	$(MAKE) -C nx/
 
 install:
 	$(MAKE) -C buildscripts/ install
-	$(MAKE) -C crt0/ install
 	$(MAKE) -C nx/ install
 
 clean:
-	$(MAKE) -C crt0/ clean
 	$(MAKE) -C nx/ clean

buildscripts/lib/switch.specs

@@ -4,5 +4,5 @@
 %(old_link) -T switch.ld%s -pie --gc-sections -z text -z nodynamic-undefined-weak
 
 *startfile:
-switch_crt0%O%s crti%O%s crtbegin%O%s
+crti%O%s crtbegin%O%s
 

crt0/Makefile

@@ -1,8 +0,0 @@
-switch_crt0.o: *.s
-	$(DEVKITA64)/bin/aarch64-none-elf-gcc -march=armv8-a -x assembler-with-cpp -c $^ -o $@
-
-install: switch_crt0.o
-	cp $^ $(DEVKITA64)/aarch64-none-elf/lib/pic/$^
-
-clean:
-	rm -f switch_crt0.o