cmake: fix finding 32 bit wxWidgets on gentoo

Generalize regex and glob against `wx/config` scripts in
`Toolchain-cross-m32.cmake` to work on gentoo, which can append the
`-gtk3` suffix.

Signed-off-by: Rafael Kitover <rkitover@gmail.com>

cmake/Toolchain-cross-m32.cmake

@@ -21,14 +21,14 @@ IF(EXISTS ${LIB32}/wx/config)
 
     SET(MAX_WX_VERSION 0.0)
     FOREACH(WX_INSTALL ${WX_INSTALLS})
-        STRING(REGEX MATCH "[0-9]+(\\.[0-9]+)+\$" WX_VERSION ${WX_INSTALL})
+        STRING(REGEX MATCH "[0-9]+(\\.[0-9]+)+" WX_VERSION ${WX_INSTALL})
 
         IF(WX_VERSION VERSION_GREATER MAX_WX_VERSION)
             SET(MAX_WX_VERSION ${WX_VERSION})
         ENDIF()
     ENDFOREACH()
 
-    FILE(GLOB WX_INSTALL_CONFIGS "${LIB32}/wx/config/*${MAX_WX_VERSION}")
+    FILE(GLOB WX_INSTALL_CONFIGS "${LIB32}/wx/config/*${MAX_WX_VERSION}*")
     LIST(GET WX_INSTALL_CONFIGS 0 WX_INSTALL_CONFIG)
 
     SET(WX_CONFIG_TRANSFORM_SCRIPT_LINES