[FFmpeg-cvslog] build: use intermediate lcov coverage file

[Andreas Cadhalpun]

ffmpeg | branch: master | Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com> | Wed Feb  3 00:24:26 2016 +0100| [14bf59c1d5b5fa3b4d075f481015b8110835276e] | committer: Andreas Cadhalpun

build: use intermediate lcov coverage file

Otherwise the 'lcov -q --remove' run fails with the following error:
lcov: ERROR: cannot write to coverage.info!

Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=14bf59c1d5b5fa3b4d075f481015b8110835276e
---

 Makefile       |    2 +-
 tests/Makefile |    5 +++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/Makefile b/Makefile
index 7d8ae4b..87a9869 100644
--- a/Makefile
+++ b/Makefile
@@ -177,7 +177,7 @@ clean::
 	$(RM) $(CLEANSUFFIXES)
 	$(RM) $(CLEANSUFFIXES:%=tools/%)
 	$(RM) -r coverage-html
-	$(RM) -rf coverage.info lcov
+	$(RM) -rf coverage.info coverage.info.in lcov
 
 distclean::
 	$(RM) $(DISTCLEANSUFFIXES)
diff --git a/tests/Makefile b/tests/Makefile
index db2bc61..6e5dfa6 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -217,8 +217,9 @@ fate-list:
 coverage.info: TAG = LCOV
 coverage.info:
 	$(M)lcov -q -d $(CURDIR) -b $(patsubst src%,./,$(SRC_LINK)) --capture | \
-	    sed "s,$(CURDIR)/\./,$(CURDIR)/," > $@
-	$(M)lcov -q --remove $@ "/usr*" -o $@
+	    sed "s,$(CURDIR)/\./,$(CURDIR)/," > $@.in
+	$(M)lcov -q --remove $@.in "/usr*" > $@
+	$(Q)$(RM) $@.in
 
 lcov:  TAG = GENHTML
 lcov: coverage.info