Use more conventional permissions and man-page directory

As 444 and 555 seem to be used for no apparent reason, use the more
conventional 644 and 755.

/man is typically unused or a symlink to /share/man now, so just use
/share/man.

Signed-off-by: JL2210 <[email protected]>

Makefile

@@ -14,10 +14,10 @@
 Q		:= @
 PREFIX		:= /usr/local
 bindir		:= ${PREFIX}/bin
-mandir		:= ${PREFIX}/man
+mandir		:= ${PREFIX}/share/man
 STRIP		:= -s
-BINMODE		:= 555
-MANMODE		:= 444
+BINMODE		:= 755
+MANMODE		:= 644
 CHECKPATCH	:= ../linux/scripts/checkpatch.pl
 
 # Other variables