Add tool_hugehelp.c into IBMi build.

[andrewkirillov-ibm]

This fixed issue #16214.

As tool_hugehelp.c is no longer included into Makefile.inc, I did add it explicitly to list of source files built on IBMi.

shellcheck issue needs fixing.

[vszakats]

shellcheck reports:

In packages/OS400/make-src.sh line 65:
for SRC in ${CURLX_CFILES}
           ^-------------^ SC2153 (info): Possible misspelling: CURLX_CFILES may not be assigned. Did you mean CURL_CFILES?

perhaps try this to silence?

--- a/packages/OS400/make-src.sh
+++ b/packages/OS400/make-src.sh
@@ -55,6 +55,7 @@ MODULES=
 # shellcheck disable=SC2034
 INCLUDES="'${TOPDIR}/lib'"
 
+# shellcheck disable=SC2153
 for SRC in ${CURLX_CFILES}
 do      MODULE=$(db2_name "${SRC}")
         MODULE=$(db2_name "X${MODULE}")

[andrewkirillov-ibm]

Done, # shellcheck disable=SC2153

[vszakats]

Thanks, merged now!