rename _improper_ctypes_check functions (#122)

Author: Freax13

Diff for: src/bootinfo/memory_map.rs

@@ -232,5 +232,5 @@ impl From<E820MemoryRegion> for MemoryRegion {
 }
 
 extern "C" {
-    fn _improper_ctypes_check(_boot_info: MemoryMap);
+    fn _improper_ctypes_check_memory_map(_memory_map: MemoryMap);
 }

Diff for: src/bootinfo/mod.rs

@@ -116,5 +116,5 @@ pub struct TlsTemplate {
 }
 
 extern "C" {
-    fn _improper_ctypes_check(_boot_info: BootInfo);
+    fn _improper_ctypes_check_bootinfo(_boot_info: BootInfo);
 }