Bug 551256 - Disable vmwarerecordinghelper on mingw.

r=ted.mielczarek.

build/win32/Makefile.in

@@ -43,9 +43,13 @@ VPATH = @srcdir@
 include $(DEPTH)/config/autoconf.mk
 
 ifdef ENABLE_TESTS
+
+ifdef _MSC_VER
+DIRS += vmwarerecordinghelper
+endif
+
 DIRS += \
   crashinjectdll \
-  vmwarerecordinghelper \
   $(NULL)
 
 PROGRAM = crashinject$(BIN_SUFFIX)