Revert "Change the try-run option as disable by default."

This reverts commit e3c2477c52f792ec972f9715ac9a810e52bc9929.

This was done for windows build support. We can disable this for
windows individually instead of disabling it for everyone.

Change-Id: I8bd322b024c0471f89e83a41589c03783c0f9893
Signed-off-by: Anas Nashif <anas.nashif@intel.com>

scripts/Kbuild.include

@@ -86,7 +86,7 @@ TMPOUT := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/)
 # Usage: option = $(call try-run, $(CC)...-o "$$TMP",option-ok,otherwise)
 # Exit code chooses option. "$$TMP" is can be used as temporary file and
 # is automatically cleaned up.
-ifdef ENABLE_TRYRUN
+ifndef DISABLE_TRYRUN
 try-run = $(shell set -e;		\
 	TMP="$(TMPOUT).$$$$.tmp";	\
 	TMPO="$(TMPOUT).$$$$.o";	\

scripts/sanitycheck

@@ -103,6 +103,7 @@ import time
 import csv
 import glob
 
+os.environ["DISABLE_TRYRUN"] = "1"
 if "ZEPHYR_BASE" not in os.environ:
     sys.stderr.write("$ZEPHYR_BASE environment variable undefined.\n")
     exit(1)