configure.in: Fix test syntax

Some versions of test allow == for equality, but others (such as the HP-UX
version) do not.  Use a single = for correctness.

Error output:
checking for monotonic clock_gettime... ./configure[20445]: ==: A test command parameter is not valid.

diff --git a/acinclude.m4 b/acinclude.m4
index 95a73e5ec0ea35d4b9263071f4d286d4645d432f..fcc2caf36e81562fd29d36ee3cd1cabe4c9caecc 100644 (file)
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -1856,7 +1856,7 @@ AC_DEFUN([CURL_CHECK_FUNC_CLOCK_GETTIME_MONOTONIC], [
   AC_CHECK_HEADERS(sys/types.h sys/time.h time.h)
   AC_MSG_CHECKING([for monotonic clock_gettime])
   #
-  if test "x$dontwant_rt" == "xno" ; then
+  if test "x$dontwant_rt" = "xno" ; then
     AC_COMPILE_IFELSE([
       AC_LANG_PROGRAM([[
 #ifdef HAVE_SYS_TYPES_H