8074554: Create custom hook for running after AC_OUTPUT

Reviewed-by: erikj
diff --git a/common/autoconf/configure.ac b/common/autoconf/configure.ac
index 902ba47..193b768 100644
--- a/common/autoconf/configure.ac
+++ b/common/autoconf/configure.ac
@@ -54,6 +54,7 @@
 
 AC_DEFUN_ONCE([CUSTOM_EARLY_HOOK])
 AC_DEFUN_ONCE([CUSTOM_LATE_HOOK])
+AC_DEFUN_ONCE([CUSTOM_CONFIG_OUTPUT_GENERATED_HOOK])
 AC_DEFUN_ONCE([CUSTOM_SUMMARY_AND_WARNINGS_HOOK])
 
 # This line needs to be here, verbatim, after all includes and the dummy hook
@@ -264,6 +265,7 @@
 
 # Create the actual output files. Now the main work of configure is done.
 AC_OUTPUT
+CUSTOM_CONFIG_OUTPUT_GENERATED_HOOK
 
 # Try to move the config.log file to the output directory.
 if test -e ./config.log; then
diff --git a/common/autoconf/generated-configure.sh b/common/autoconf/generated-configure.sh
index 6029574..7ae33d1 100644
--- a/common/autoconf/generated-configure.sh
+++ b/common/autoconf/generated-configure.sh
@@ -4387,13 +4387,14 @@
 
 
 
+
 # This line needs to be here, verbatim, after all includes and the dummy hook
 # definitions. It is replaced with custom functionality when building
 # custom sources.
 #CUSTOM_AUTOCONF_INCLUDE
 
 # Do not change or remove the following line, it is needed for consistency checks:
-DATE_WHEN_GENERATED=1424976950
+DATE_WHEN_GENERATED=1425649598
 
 ###############################################################################
 #
@@ -53396,6 +53397,7 @@
 fi
 
 
+
 # Try to move the config.log file to the output directory.
 if test -e ./config.log; then
   $MV -f ./config.log "$OUTPUT_ROOT/config.log" 2> /dev/null