configure*: fix trailing comma in HAVE_CONTRIB_INSTALL

Consider the current code:

    AS_IF([test "x$enable_lts" = "xyes"], [
    # ...
            HAVE_CONTRIB_INSTALL="no",

Result of testing the value:

    $ HAVE_CONTRIB_INSTALL="no",
    $ printf '%s\n' "$HAVE_CONTRIB_INSTALL"
    no,
    $ test "x$HAVE_CONTRIB_INSTALL" = "xno" &&
      echo equal || echo 'not equal'
    not equal

This means that whenever HAVE_LTS is enabled, HAVE_CONTRIB_INSTALL is
always considered enabled when testing against "no".

But luckily, in the current code the latter variable is only tested
against "yes", so nothing should be affected:

    $ git grep HAVE_CONTRIB_INSTALL |
      grep -v -e '^configure:' -e '^configure.ac:'
    Makefile:ifeq ($(HAVE_CONTRIB_INSTALL),yes)
    config.mk.in:HAVE_CONTRIB_INSTALL=@HAVE_CONTRIB_INSTALL@

Added on commit d1acb31c9 ("compile time: enable LTS", 2021-02-28).

1 files changed, 1 insertions, 1 deletions

diff --git a/configure.ac b/configure.ac
index 62702f7bc..250dcba88 100644
--- a/configure.ac
+++ b/configure.ac
@@ -272,7 +272,7 @@ AS_IF([test "x$enable_lts" = "xyes"], [
         HAVE_FILE_TRANSFER=""
         HAVE_SUID="-DHAVE_SUID"
         BUSYBOX_WORKAROUND="no"
-        HAVE_CONTRIB_INSTALL="no",
+        HAVE_CONTRIB_INSTALL="no"
 ])
 
 AC_CHECK_HEADER([linux/seccomp.h], [], AC_MSG_ERROR([*** SECCOMP support is not installed (/usr/include/linux/seccomp.h missing) ***]))