avsync-lib: CF1 support syslog and logcat [1/1]

PD#TV-61176

Problem:
Some platforms is not stdout/stderr friendly. Any log can cause
scheuding issue for AVsync.

Solution:
Add compile options for syslog and logcat support

Verify:
T5D + Roxton

Change-Id: I723b4fd0560e4d71adee64fe7961580506bf694a
Signed-off-by: Song Zhao <song.zhao@amlogic.com>
diff --git a/Makefile b/Makefile
index 920849e..d32ecf5 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@
 
 #export CC BUILD_DIR STAGING_DIR TARGET_DIR
 all:
-	-$(MAKE) -C src all
+	-$(MAKE) -C LOG=$(LOG) src all
 install:
 	-$(MAKE) -C src install
 clean: