qemu: update musl-ppc patch to unbreak build

[ci skip]

srcpkgs/qemu/patches/musl-ppc.patch

@@ -58,3 +58,16 @@
  
      if (*pcreg > (uintptr_t)safe_syscall_start
          && *pcreg < (uintptr_t)safe_syscall_end) {
+--- util/mmap-alloc.c
++++ util/mmap-alloc.c
+@@ -25,6 +25,10 @@
+ 
+ #ifdef CONFIG_LINUX
+ #include <sys/vfs.h>
++/* musl undefs this on ppc and mips */
++#ifndef MAP_SYNC
++#define MAP_SYNC 0x80000
++#endif
+ #endif
+ 
+ size_t qemu_fd_getpagesize(int fd)