trace-cmd: fix musl

Signed-off-by: Jürgen Buchmüller <pullmoll@t-online.de>

srcpkgs/trace-cmd/patches/fix-program-name.patch

@@ -0,0 +1,23 @@
+--- kernel-shark/src/kernelshark.cpp	2019-07-05 18:23:00.000000000 +0200
++++ kernel-shark/src/kernelshark.cpp	2019-07-08 17:52:19.081010524 +0200
+@@ -35,6 +35,11 @@
+ {
+ 	QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+ 	QApplication a(argc, argv);
++	const char* program_name = strrchr(argv[0], '/');
++	if (nullptr == program_name)
++		program_name = argv[0];
++	else
++		++program_name;
+ 
+ 	KsMainWindow ks;
+ 
+@@ -48,7 +51,7 @@
+ 			return 0;
+ 
+ 		case 'v':
+-			printf("%s - %s\n", basename(argv[0]), KS_VERSION_STRING);
++			printf("%s - %s\n", program_name, KS_VERSION_STRING);
+ 			return 0;
+ 
+ 		case 'i':