libpixelflinger: MIPS64 assembler test bug fix

Change-Id: I47f77790baabea85ee318976a2c44ab1c0c0b9cb
diff --git a/libpixelflinger/codeflinger/MIPSAssembler.cpp b/libpixelflinger/codeflinger/MIPSAssembler.cpp
index daa231f..5497fae 100644
--- a/libpixelflinger/codeflinger/MIPSAssembler.cpp
+++ b/libpixelflinger/codeflinger/MIPSAssembler.cpp
@@ -1256,6 +1256,12 @@
     mDuration = ggl_system_time();
 }
 
+MIPSAssembler::MIPSAssembler(void* assembly)
+    : mParent(NULL), mAssembly(NULL)
+{
+    mBase = mPC = (uint32_t *)assembly;
+}
+
 MIPSAssembler::~MIPSAssembler()
 {
 }