android-5.1: use char constructor for default on c++ streams

Change-Id: I4be681c2720f62182e57237b1cfefc384235f0e1
diff --git a/twrp-functions.cpp b/twrp-functions.cpp
index 4386ff6..a3e5a07 100755
--- a/twrp-functions.cpp
+++ b/twrp-functions.cpp
@@ -524,7 +524,7 @@
 			destLogBuffer.append(destFileBuffer);
 		}
 	} else if (Path_Exists(uncompressedLog)) {
-		std::ifstream uncompressedIfs(uncompressedLog);
+		std::ifstream uncompressedIfs(uncompressedLog.c_str());
 		std::stringstream uncompressedSS;
 		uncompressedSS << uncompressedIfs.rdbuf();
 		uncompressedIfs.close();
@@ -533,7 +533,7 @@
 		std::remove(uncompressedLog.c_str());
 	}
 
-	std::ifstream ifs(Source);
+	std::ifstream ifs(Source.c_str());
 	std::stringstream ss;
 	ss << ifs.rdbuf();
 	std::string srcLogBuffer(ss.str());
@@ -759,8 +759,8 @@
 		LOGINFO("Unable to find source file %s\n", src.c_str());
 		return -1;
 	}
-	std::ifstream srcfile(src, ios::binary);
-	std::ofstream dstfile(dst, ios::binary);
+	std::ifstream srcfile(src.c_str(), ios::binary);
+	std::ofstream dstfile(dst.c_str(), ios::binary);
 	dstfile << srcfile.rdbuf();
 	if (!dstfile.bad()) {
 		LOGINFO("Copied file %s to %s\n", src.c_str(), dst.c_str());