8074554: Create custom hook for running after AC_OUTPUT

Reviewed-by: erikj

common/autoconf/configure.ac

@@ -53,6 +53,7 @@ m4_include([toolchain_windows.m4])
 
 AC_DEFUN_ONCE([CUSTOM_EARLY_HOOK])
 AC_DEFUN_ONCE([CUSTOM_LATE_HOOK])
+AC_DEFUN_ONCE([CUSTOM_CONFIG_OUTPUT_GENERATED_HOOK])
 
 # This line needs to be here, verbatim, after all includes and the dummy hook
 # definitions. It is replaced with custom functionality when building
@@ -237,6 +238,7 @@ CONFIG_STATUS="$OUTPUT_ROOT/config.status"
 
 # 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

common/autoconf/generated-configure.sh

@@ -3871,13 +3871,14 @@ fi
 
 
 
+
 # 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=1425379745
+DATE_WHEN_GENERATED=1425892875
 
 ###############################################################################
 #
@@ -37467,6 +37468,7 @@ $as_echo "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2;}
 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