all: linux/mips port

Change-Id: I0af67bc44c7bb62a8e5a47eac597367f521f1c11
Reviewed-on: https://plan9port-review.googlesource.com/1210
Reviewed-by: Russ Cox <rsc@google.com>

dist/buildmk

@@ -12,6 +12,7 @@ OBJTYPE=`(uname -m -p 2>/dev/null || uname -m) | sed '
 	s;.*PowerMacintosh.*;power;g;
 	s;.*Power.Macintosh.*;power;g;
 	s;.*macppc.*;power;g;
+	s;.*mips.*;mips;g;
 	s;.*ppc64.*;power;g;
 	s;.*ppc.*;power;g;
 	s;.*alpha.*;alpha;g;

src/lib9/getcallerpc-mips.c

@@ -0,0 +1,8 @@
+#include <lib9.h>
+
+ulong
+getcallerpc(void *x)
+{
+	return ((ulong*)x)[-2];
+}
+

src/libmp/mips/mkfile

@@ -0,0 +1,4 @@
+all:
+
+%:V:
+	# nothing to see here

src/libsec/mips/mkfile

@@ -0,0 +1,4 @@
+all:
+
+%:V:
+	# nothing to see here

src/mkhdr

@@ -10,6 +10,7 @@ OBJTYPE=`(uname -m -p 2>/dev/null || uname -m) | sed '
 	s;.*PowerMacintosh.*;power;g;
 	s;.*Power.Macintosh.*;power;g;
 	s;.*macppc.*;power;g;
+	s;.*mips.*;mips;g;
 	s;.*ppc64.*;power;g;
 	s;.*ppc.*;power;g;
 	s;.*alpha.*;alpha;g;