configure: check if eaccess is available

To fix the error on Android:
external/alsa-lib//src/ucm/parser.c:2521:7: error: implicit declaration of function 'eaccess' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
                if (eaccess(filename, R_OK))
                    ^
external/alsa-lib//src/ucm/parser.c:2521:7: note: did you mean 'access'?
bionic/libc/include/unistd.h:125:5: note: 'access' declared here
int access(const char* __path, int __mode);
    ^
1 error generated.

Signed-off-by: Chih-Wei Huang <cwhuang@linux.org.tw>

configure.ac

@@ -50,6 +50,7 @@ AC_HEADER_TIME
 dnl Checks for library functions.
 AC_PROG_GCC_TRADITIONAL
 AC_CHECK_FUNCS([uselocale])
+AC_CHECK_FUNCS([eaccess])
 
 SAVE_LIBRARY_VERSION
 AC_SUBST(LIBTOOL_VERSION_INFO)

src/ucm/parser.c

@@ -2518,7 +2518,11 @@ int uc_mgr_scan_master_configs(const char **_list[])
 
 		snprintf(fn, sizeof(fn), "%s.conf", d_name);
 		ucm_filename(filename, sizeof(filename), 2, d_name, fn);
+#ifdef HAVE_EACCESS
 		if (eaccess(filename, R_OK))
+#else
+		if (access(filename, R_OK))
+#endif
 			continue;
 
 		err = uc_mgr_config_load(2, filename, &cfg);

src/ucm/ucm_cond.c

@@ -305,7 +305,11 @@ static int if_eval_path(snd_use_case_mgr_t *uc_mgr, snd_config_t *eval)
 		return -EINVAL;
 	}
 
+#ifdef HAVE_EACCESS
 	if (eaccess(path, amode))
+#else
+	if (access(path, amode))
+#endif
 		return 0;
 
 	return 1;