IPACM: Do not use deprecated strncpy function

strncpy function is deprecated and should not be used.

Change-Id: Icd5c080efdb53f77fad16a98928489faa493eddc
diff --git a/ipanat/src/ipa_nat_drvi.c b/ipanat/src/ipa_nat_drvi.c
index 9b06028..675dcf5 100644
--- a/ipanat/src/ipa_nat_drvi.c
+++ b/ipanat/src/ipa_nat_drvi.c
@@ -35,11 +35,16 @@
 #define strlcpy g_strlcpy
 #else
 #ifndef FEATURE_IPA_ANDROID
-static size_t strlcpy(char * dst, const char * src, size_t size) {
+static size_t strlcpy(char * dst, const char * src, size_t size)
+{
+	size_t i;
+
 	if (size < 1)
 		return 0;
-	strncpy(dst, src, size - 1);
-	dst[size - 1] = 0;
+	for (i = 0; i < (size - 1) && src[i] != '\0'; i++)
+		dst[i] = src[i];
+	for (; i < size; i++)
+		dst[i] = '\0';
 	return strlen(dst);
 }
 #endif