zte's code,first commit

Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/build/uClibc/libm/s_signgam.c b/ap/build/uClibc/libm/s_signgam.c
new file mode 100644
index 0000000..d67d591
--- /dev/null
+++ b/ap/build/uClibc/libm/s_signgam.c
@@ -0,0 +1,3 @@
+#include "math.h"
+#include "math_private.h"
+int signgam = 0;