csound: fix i686* and *-musl builds

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

srcpkgs/csound/patches/buffersize.patch

@@ -0,0 +1,11 @@
+--- OOps/ugrw1.c	2018-05-10 10:31:20.000000000 +0200
++++ OOps/ugrw1.c	2018-05-13 10:40:15.438512047 +0200
+@@ -1057,7 +1057,7 @@
+  */
+ static int32_t sprints(char *outstring,  char *fmt, MYFLT **kvals, int32_t numVals)
+ {
+-    char tmp[8],cc;
++    char tmp[10],cc;
+     int32_t j = 0;
+     int32_t len = 8192;
+     while (*fmt) {

srcpkgs/csound/patches/musl.patch

@@ -9,3 +9,14 @@
      #include <execinfo.h>
  
      {
+--- Opcodes/linuxjoystick.c	2018-05-10 10:31:20.000000000 +0200
++++ Opcodes/linuxjoystick.c	2018-05-13 10:47:51.360535568 +0200
+@@ -36,7 +36,7 @@
+ */
+ 
+ #include "linuxjoystick.h"
+-#include <sys/errno.h>
++#include <errno.h>
+ 
+ static int32_t linuxjoystick (CSOUND *csound, LINUXJOYSTICK *stick)
+ {

srcpkgs/csound/patches/unused-variable.patch

@@ -0,0 +1,10 @@
+--- Top/threadsafe.c	2018-05-10 10:31:20.000000000 +0200
++++ Top/threadsafe.c	2018-05-13 10:45:03.246526895 +0200
+@@ -551,6 +551,7 @@
+     csoundSpinLock(lock);
+     *pval  = val;
+     csoundSpinUnLock(lock);
++    (void)x;
+   }
+ #endif
+ }