[3/6] codec2: Rename AUTOMAKE_OPTS to AUTOMAKE_OPTIONS

The latter is a well known automake variable, used
to set (per-Makefile) automake options and supported
since the beginning of time (= automake 1.4).

The former is a made-up variable that doesn't really
do anything.
Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

libs/libcodec2/Makefile.am

 AM_CFLAGS = -Isrc -Wall -lm
-AUTOMAKE_OPTS = gnu
+AUTOMAKE_OPTIONS = gnu
 NAME = libcodec2
 AM_CPPFLAGS = $(AM_CFLAGS)
 

libs/libcodec2/src/Makefile.am

 AM_CFLAGS = -I../src -Wall -DFLOATING_POINT -DVAR_ARRAYS
-AUTOMAKE_OPTS = gnu
+AUTOMAKE_OPTIONS = gnu
 NAME = libcodec2
 AM_CPPFLAGS = $(AM_CFLAGS)
 

libs/libcodec2/unittest/Makefile.am

 AM_CFLAGS = -I../src -g  -DFLOATING_POINT -DVAR_ARRAYS
-AUTOMAKE_OPTS = gnu
+AUTOMAKE_OPTIONS = gnu
 NAME = libcodec2
 AM_CPPFLAGS = $(AM_CFLAGS)