Add Borland -tWM switch so works for Boost.Threads

[SVN r11183]

status/compiler.cfg

@@ -252,8 +252,8 @@ c++ -o boosttmp.exe -ftemplate-depth-30 -D_STLP_DEBUG -Wall -I/boot/home/config/
 win32
 bcc
 Borland C++ 5.5.1
-bcc32 -c -I%include -j10 -q %source
-bcc32 -eboosttmp.exe -I%include -j10 -q %source
+bcc32 -c -tWM -I%include -j10 -q %source
+bcc32 -eboosttmp.exe -tWM -I%include -j10 -q %source
 Borland<br><a href="http://www.borland.com/bcppbuilder/freecompiler/">BCC</a><br>5.5.1
 
 win32