Fix if statement that triggers syntax error in CMake 3.20 and later.

Taken from upstream:
https://github.com/mariadb-corporation/mariadb-connector-c/commit/242cab8c

diff --git a/libmariadb/cmake/ConnectorName.cmake b/libmariadb/cmake/ConnectorName.cmake
--- a/libmariadb/cmake/ConnectorName.cmake
+++ b/libmariadb/cmake/ConnectorName.cmake
@@ -22,7 +22,7 @@ IF(CMAKE_SYSTEM_NAME MATCHES "Windows")
     SET(MACHINE_NAME "x64")
   ELSE()
     SET(MACHINE_NAME "32")
-  END()
+  ENDIF()
 ENDIF()
 
 SET(product_name "mysql-connector-c-${CPACK_PACKAGE_VERSION}-${PLATFORM_NAME}${CONCAT_SIGN}${MACHINE_NAME}")pe='hidden' name='id' value='d2b7d14db4a1ba454d781f5ea796c4a457aaef02'/><select name='h' onchange='this.form.submit();'>
<option value='koszko' selected='selected'>koszko</option>
<option value='koszko-scripts'>koszko-scripts</option>
</select> <input type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>Wojtek's customized Guix</td><td class='sub right'></td></tr></table>
<table class='tabs'><tr><td>
<a href='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=d2b7d14db4a1ba454d781f5ea796c4a457aaef02'>refs</a><a class='active' href='/guix/log/tests/guix-locate.sh'>log</a><a href='/guix/tree/tests/guix-locate.sh?id=d2b7d14db4a1ba454d781f5ea796c4a457aaef02'>tree</a><a href='/guix/commit/tests/guix-locate.sh?id=d2b7d14db4a1ba454d781f5ea796c4a457aaef02'>commit</a><a href='/guix/diff/tests/guix-locate.sh?id=d2b7d14db4a1ba454d781f5ea796c4a457aaef02'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/tests/guix-locate.sh'>
<input type='hidden' name='id' value='d2b7d14db4a1ba454d781f5ea796c4a457aaef02'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=d2b7d14db4a1ba454d781f5ea796c4a457aaef02'>root</a>/<a href='/guix/log/tests?id=d2b7d14db4a1ba454d781f5ea796c4a457aaef02'>tests</a>/<a href='/guix/log/tests/guix-locate.sh?id=d2b7d14db4a1ba454d781f5ea796c4a457aaef02'>guix-locate.sh</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/tests/guix-locate.sh?id=d2b7d14db4a1ba454d781f5ea796c4a457aaef02&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-11-15 18:29:37 +0100'>2023-11-15</span></td><td><a href='/guix/commit/tests/guix-locate.sh?id=69d9a020949c77c77b449c1faf04397b95eef5b7'>locate: Accept ‘--clear’ without additional arguments.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes a bug whereby ‘guix locate --clear’ would end with the “no files
to search for” error.

Fixes &lt;https://issues.guix.gnu.org/66799&gt;.

* guix/scripts/locate.scm (guix-locate): Do not emit “no files to search
for” error when 'clear? is set in OPTS.
* tests/guix-locate.sh: Test it.

Reported-by: Maciej Kalandyk &lt;m.kalandyk@outlook.com&gt;
Change-Id: Ib8fa125c18481d7f5408bd89df9503713527641d
</span></span></td><td>Ludovic Courtès</td></tr>