Add patch to fix building glibc 2.20 on sparc

This actually comes from upstream:
https://sourceware.org/ml/libc-alpha/2014-09/msg00317.html
It is needed for plain glibc as well as linaro's version.
A symlink is added for the latter's version 2.20-2014.11.

Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
Signed-off-by: Stefan Tauner <stefan.tauner@gmx.at>

patches/glibc/2.20/100-sparc-nptl.patch

@@ -0,0 +1,14 @@
+diff --git a/sysdeps/sparc/sparc32/sem_trywait.c b/sysdeps/sparc/sparc32/sem_trywait.c
+index 7d0fc55..ad9b4ad 100644
+--- a/sysdeps/sparc/sparc32/sem_trywait.c
++++ b/sysdeps/sparc/sparc32/sem_trywait.c
+@@ -22,6 +22,7 @@
+ #include <lowlevellock.h>
+ #include <internaltypes.h>
+ #include <semaphore.h>
++#include <sparc-nptl.h>
+ 
+ #include <shlib-compat.h>
+ 
+ 
+

patches/glibc/linaro-2.20-2014.11

@@ -0,0 +1 @@
+2.20