valgrind: add a patch to fix MIPS R6 by replacing ADDI with ADDIU

The ADDI instruction has been removed for MIPS R6, so valgrind fails to
build for this revision level because it uses that assembly
instruction. Using ADDIU instead fixes the problem.

The patch has been sent upstream:

  https://bugs.kde.org/show_bug.cgi?id=356112

Fixes:

  http://autobuild.buildroot.net/results/488/488937704b3b6bae8daed7b24da8c740b56f4d84/

Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/valgrind/0003-mips-replace-addi-with-addiu.patch

@@ -0,0 +1,51 @@
+mips: replace addi with addiu
+
+ADDI instruction has been removed in R6 so let's use ADDIU instead.
+
+This patch has been sent upstream:
+
+  https://bugs.kde.org/show_bug.cgi?id=356112
+
+Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
+
+Index: valgrind/coregrind/m_dispatch/dispatch-mips32-linux.S
+===================================================================
+--- valgrind/coregrind/m_dispatch/dispatch-mips32-linux.S	(revision 15740)
++++ valgrind/coregrind/m_dispatch/dispatch-mips32-linux.S	(working copy)
+@@ -196,7 +196,7 @@
+         addu $13, $13, $14
+ 
+         lw $12, 0($13) /* t3 = VG_(tt_fast)[hash] :: ULong* */
+-        addi $13, $13, 4
++        addiu $13, $13, 4
+         lw $25, 0($13) /* little-endian, so comparing 1st 32bit word */
+         nop
+ 
+Index: valgrind/coregrind/m_libcsetjmp.c
+===================================================================
+--- valgrind/coregrind/m_libcsetjmp.c	(revision 15740)
++++ valgrind/coregrind/m_libcsetjmp.c	(working copy)
+@@ -594,7 +594,7 @@
+ /* Checking whether second argument is zero. */
+ "   bnez $a1, 1f                \n\t"
+ "   nop                         \n\t"
+-"   addi $a1, $a1, 1            \n\t"  /* We must return 1 if val=0. */
++"   addiu $a1, $a1, 1           \n\t"  /* We must return 1 if val=0. */
+ "1:                             \n\t"
+ "   move $v0, $a1               \n\t"  /* Return value of second argument. */
+ "   j    $ra                    \n\t"
+Index: valgrind/coregrind/m_trampoline.S
+===================================================================
+--- valgrind/coregrind/m_trampoline.S	(revision 15740)
++++ valgrind/coregrind/m_trampoline.S	(working copy)
+@@ -1254,8 +1254,8 @@
+       //la $a0, string
+       j strlen_cond
+    strlen_loop:
+-      addi $v0, $v0, 1
+-      addi $a0, $a0, 1
++      addiu $v0, $v0, 1
++      addiu $a0, $a0, 1
+    strlen_cond:
+       lbu $t0, ($a0)
+       bne $t0, $zero, strlen_loop