Forcefully disable ccache for tests.

It breaks otherwise valid Simple_Mingw_Linux2Win test.

debian/changelog

@@ -6,6 +6,8 @@ cmake (2.8.1-0r1) UNRELEASED; urgency=low
   * Update debian/patches:
     - drop bootstraptest_increase_timeout.diff - merged upstream;
     - hurd_platform.diff - adapt to upstream changes.
+  * Forcefully set MINGW_CC_LINUX2WIN_EXECUTABLE to empty value. It breaks
+    otherwise valid Simple_Mingw_Linux2Win test when ccache is enabled.
 
  -- Modestas Vainius <modestas@vainius.eu>  Sun, 06 Dec 2009 21:39:01 +0200
 

debian/rules

@@ -13,6 +13,7 @@ $(BUILD_FLAGS_FILE):
 #	echo 'set(BUILD_WXDialog ON CACHE STRING "Build WXDialog" FORCE)'      >> $@
 	echo 'set(BUILD_CursesDialog TRUE CACHE BOOL "Build curses GUI" FORCE)' >> $@
 	echo 'set(BUILD_QtDialog TRUE CACHE BOOL "Build Qt4 GUI" FORCE)'        >> $@
+	echo 'set(MINGW_CC_LINUX2WIN_EXECUTABLE "" CACHE FILEPATH "Never detect mingw" FORCE)' >> $@
 #	echo 'set(TARGET_VERSION CACHE STRING ""FORCE)'                        >> $@
 #	echo 'set(TARGET_SOVERSION CACHE STRING "" FORCE)'                     >> $@
 #	echo 'set(BUILD_DOCUMENTATION ON CACHE BOOL "" FORCE)'                 >> $@