tree-wide: include asm/sgidefs.h to make _MIPS_SIM_ABI32 and friends defined

The header provides _MIPS_SIM_ABI32 and friends. Glibc indirectly includes
the header through sys/syscall.h or unistd.h, but let's explicitly include
the header where we use _MIPS_SIM_ABI32 and friends.

src/include/override/sys/generate-syscall.py

@@ -44,6 +44,10 @@ HEADER = '''\
 
 #include_next <sys/syscall.h>
 
+#ifdef ARCH_MIPS
+#include <asm/sgidefs.h>
+#endif
+
 #include <assert.h>
 '''
 

src/include/override/sys/syscall.h

@@ -8,6 +8,10 @@
 
 #include_next <sys/syscall.h>
 
+#ifdef ARCH_MIPS
+#include <asm/sgidefs.h>
+#endif
+
 #include <assert.h>
 
 /* Note: if this code looks strange, this is because it is derived from the same

src/shared/base-filesystem.c

@@ -5,6 +5,10 @@
 #include <syslog.h>
 #include <unistd.h>
 
+#ifdef ARCH_MIPS
+#include <asm/sgidefs.h>
+#endif
+
 #include "alloc-util.h"
 #include "base-filesystem.h"
 #include "errno-util.h"

src/shared/seccomp-util.c

@@ -8,6 +8,10 @@
 #include <sys/shm.h>
 #include <sys/stat.h>
 
+#ifdef ARCH_MIPS
+#include <asm/sgidefs.h>
+#endif
+
 #include "af-list.h"
 #include "alloc-util.h"
 #include "env-util.h"