[PATCH] vbscript: Implement case insensitive search in InStrRev function

[Marvin]

Hi,

While running your changed tests, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?

Full results can be found at:
https://testbot.winehq.org/JobDetails.pl?Key=76618

Your paranoid android.

=== w2008s64 (32 bit report) ===

vbscript:
run.c:1207: Test failed: api.vbs: L"InStrRev returned 0"

=== w8 (32 bit report) ===

vbscript:
run.c:1207: Test failed: api.vbs: L"InStrRev returned 0"

=== w8adm (32 bit report) ===

vbscript:
run.c:1207: Test failed: api.vbs: L"InStrRev returned 0"

=== w1064v1507 (32 bit report) ===

vbscript:
run.c:1207: Test failed: api.vbs: L"InStrRev returned 0"

=== w1064v1809 (32 bit report) ===

vbscript:
run.c:1207: Test failed: api.vbs: L"InStrRev returned 0"

=== w1064v1809_2scr (32 bit report) ===

vbscript:
run.c:1207: Test failed: api.vbs: L"InStrRev returned 0"

=== w1064v1809_ar (32 bit report) ===

vbscript:
run.c:1207: Test failed: api.vbs: L"InStrRev returned 0"

=== w1064v1809_he (32 bit report) ===

vbscript:
run.c:1207: Test failed: api.vbs: L"InStrRev returned 0"

=== w1064v1809_ja (32 bit report) ===

vbscript:
run.c:1207: Test failed: api.vbs: L"InStrRev returned 0"

=== w1064v1809_zh_CN (32 bit report) ===

vbscript:
run.c:1207: Test failed: api.vbs: L"InStrRev returned 0"

=== w2008s64 (64 bit report) ===

vbscript:
run.c:1207: Test failed: api.vbs: L"InStrRev returned 0"

=== w864 (64 bit report) ===

vbscript:
run.c:1207: Test failed: api.vbs: L"InStrRev returned 0"

=== w1064v1507 (64 bit report) ===

vbscript:
run.c:1207: Test failed: api.vbs: L"InStrRev returned 0"

=== w1064v1809 (64 bit report) ===

vbscript:
run.c:1207: Test failed: api.vbs: L"InStrRev returned 0"