lib: Rename endianness.h to int_endianness.h (for consistency) and tidy up a bit.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@144669 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/int_lib.h b/lib/int_lib.h
index f1c1b11..dd65b69 100644
--- a/lib/int_lib.h
+++ b/lib/int_lib.h
@@ -16,6 +16,10 @@
 #ifndef INT_LIB_H
 #define INT_LIB_H
 
+/* Assumption: Signed integral is 2's complement. */
+/* Assumption: Right shift of signed negative is arithmetic shift. */
+/* Assumption: Endianness is little or big (not mixed). */
+
 /* ABI macro definitions */
 
 #if __ARM_EABI__
@@ -27,12 +31,8 @@
 # define COMPILER_RT_ABI
 #endif
 
-/* Assumption:  signed integral is 2's complement */
-/* Assumption:  right shift of signed negative is arithmetic shift */
-
 #include <limits.h>
 #include <stdint.h>
-#include "endianness.h"
 #include <math.h>
 
 /* If compiling for kernel use, call panic() instead of abort(). */