Switch from using 'nacl_main' to 'main' entry point

ports/less/nacl.patch

-diff --git a/Makefile.in b/Makefile.in
---- a/Makefile.in
-+++ b/Makefile.in
-@@ -54,7 +54,7 @@ OBJ = \
- all: less$(EXEEXT) lesskey$(EXEEXT) lessecho$(EXEEXT)
- 
- less$(EXEEXT): ${OBJ}
--       ${CC} ${LDFLAGS} -o $@ ${OBJ} ${LIBS}
-+       ${CC} ${LDFLAGS} -o $@ ${OBJ} ${NACL_CLI_MAIN_LIB} ${LIBS}
- 
- lesskey$(EXEEXT): lesskey.${O} version.${O}
-        ${CC} ${LDFLAGS} -o $@ lesskey.${O} version.${O}
-diff --git a/main.c b/main.c
---- a/main.c
-+++ b/main.c
-@@ -64,7 +64,12 @@ extern int   pr_type;
-  * Entry point.
-  */
- int
--main(argc, argv)
-+# if defined(__native_client__)
-+nacl_main
-+# else
-+main
-+# endif
-+(argc, argv)
-        int argc;
-        char *argv[];
- {
 diff --git a/screen.c b/screen.c
 --- a/screen.c
 +++ b/screen.c
 @@ -282,7 +282,8 @@ raw_mode(on)
                         save_term = s;
                         saved_term = 1;
                 }
 -#if HAVE_OSPEED
 +/*cfgetospeed is not linkable , shouldn't define HAVE_OSPEED */
 +#if HAVE_OSPEED &&  !defined(__native_client__)
                 switch (cfgetospeed(&s))
                 {
  #ifdef B0