pthsem: add patch for linux 3.x

Signed-off-by: Othmar Truniger <github@truniger.ch>

libs/pthsem/patches/001-linux3x-fix.patch

@@ -0,0 +1,12 @@
+--- pthsem-2.0.8/acinclude.m4
++++ pthsem-2.0.8/acinclude.m4
+@@ -892,6 +892,8 @@
+         case "x`uname -r`" in
+ changequote(, )dnl
+             x2.[23456789]* ) ;;
++changequote(, )dnl
++            x3.* ) ;;
+ changequote([, ])
+             * ) braindead=yes ;;
+         esac
+