cmake: update kernel name references

arch/x86_64/Platform/Rosetta.cmake

@@ -7,7 +7,7 @@ find_program(C_COMPILER x86_64-elf-gcc REQUIRED)
 find_program(CXX_COMPILER x86_64-elf-g++ REQUIRED)
 #find_program(ASM_COMPILER x86_64-elf-as REQUIRED)
 
-add_compile_definitions(__mango__=1 __rosetta__=1)
+add_compile_definitions(__magenta__=1 __rosetta__=1)
 
 set(CMAKE_C_COMPILER ${C_COMPILER})
 set(CMAKE_CXX_COMPILER ${CXX_COMPILER})

arch/x86_64/test/check-results

@@ -16,7 +16,7 @@ def successful_boot(boot_log, out):
         log(out, "Multiple kernel panics!")
         return 1
 
-    nr_boots = boot_log.count('Mango kernel version')
+    nr_boots = boot_log.count('Magenta kernel version')
     if nr_boots == 0:
         log(out, "Kernel didn't start!")
         return 1