trace-cmd: remove the compile fix patch

And instead override TARGET_CFLAGS to set _GNU_SOURCE accordingly since
this is the upstream maintainer solution.

Signed-off-by: Florian Fainelli <florian@openwrt.org>

SVN-Revision: 37152

package/devel/trace-cmd/patches/100-compile_fix.patch

@@ -1,20 +0,0 @@
---- a/trace-listen.c
-+++ b/trace-listen.c
-@@ -17,6 +17,7 @@
-  *
-  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-  */
-+#define _GNU_SOURCE
- #define _LARGEFILE64_SOURCE
- #include <dirent.h>
- #include <stdio.h>
---- a/trace-record.c
-+++ b/trace-record.c
-@@ -17,6 +17,7 @@
-  *
-  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-  */
-+#define _GNU_SOURCE
- #include <dirent.h>
- #include <stdio.h>
- #include <stdlib.h>