Fix asm-offsets generation

There is a difference between the asm-offsets.s generated by clang and GCC:

Signed-off-by: Stewart Smith <[email protected]>

Author: shenki

make_offsets.sh

@@ -5,6 +5,6 @@ cat <<EOF
 #define ASM_OFFSETS_H
 /* Derived from $1 by make_offsets.sh */
 
-`grep '^#define' $1`
+`grep '#define' $1`
 #endif /* ASM_OFFSETS_H */
 EOF