[LTP] [PATCH v2 ltp] Add .cache.mk and *.dwo into clean target and .gitignore

[Yixin Zhang]

These files are generated during build, so and them into clean target
and .gitignore

Signed-off-by: Yixin Zhang <yixin.zhang@intel.com>
---
 .gitignore             | 2 ++
 include/mk/env_post.mk | 3 ++-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/.gitignore b/.gitignore
index a7e65633f..b838efd59 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,6 +8,8 @@ core
 .gdb_history
 .gdbinit
 lib*.a
+.cache.mk
+*.dwo
 
 /aclocal.m4
 autom4te.cache
diff --git a/include/mk/env_post.mk b/include/mk/env_post.mk
index 4c57fffe4..913bdf5d1 100644
--- a/include/mk/env_post.mk
+++ b/include/mk/env_post.mk
@@ -54,7 +54,8 @@ MAKE_TARGETS			?= $(notdir $(patsubst %.c,%,$(wildcard $(abs_srcdir)/*.c)))
 
 MAKE_TARGETS			:= $(filter-out $(FILTER_OUT_MAKE_TARGETS),$(MAKE_TARGETS))
 
-CLEAN_TARGETS			+= $(MAKE_TARGETS) *.o *.pyc
+# with only *.dwo, .[0-9]+.dwo can not be cleaned
+CLEAN_TARGETS			+= $(MAKE_TARGETS) *.o *.pyc .cache.mk *.dwo .*.dwo
 
 # Majority of the files end up in testcases/bin...
 INSTALL_DIR			?= testcases/bin
-- 
2.14.1