Type the return of InvokeStaticFunction in LIR

Summary:
This ended up biting me while I was working on de-stringifying IntBinaryOp.  I
was getting a crash in `make testcinder_jit` due to an invalid `imul bl, cl`
instruction being generated (8-bit imul has to use ax and al).

I tracked down the issue to this small repro, P580265190.  Note how IntBinaryOp
is getting a value that comes from an InvokeStaticFunction.  In HIR, the return
value is typed as CInt8, but the LIR generator generated `Mul RAX:Object,
RCX:8bit`.
This means the `rewriteByteMultiply` function in postalloc.cpp
(https://fburl.com/code/770swxgu) can't kick in for cases like this because the
first operand is not being correctly typed as an 8-bit argument.

Adding the return type to the Call generated for the InvokeStaticFunction fixes
the crash for me.

Test Plan:
`make -j testcinder_jit`, both with and without changes to use
`BasicBlockBuilder.appendInstr()` for IntBinaryOp in D42143109.

Reviewers: jbower, carljm, #cinderjit

Reviewed By: carljm

Differential Revision: https://phabricator.intern.facebook.com/D42143037

Tags: cinder-310-exclusive

Jit/lir/generator.cpp

@@ -1851,7 +1851,8 @@ LIRGenerator::TranslatedBlock LIRGenerator::TranslateOneBasicBlock(
           std::string tmp_id = GetSafeTempName();
           bbb.AppendCode(
               "Load {}, {:#x}", tmp_id, reinterpret_cast<uint64_t>(indir));
-          ss << "Call " << instr->dst()->name() << ", " << tmp_id;
+          ss << "Call " << instr->dst()->name() << ":" << instr->dst()->type()
+             << ", " << tmp_id;
         }
 
         for (size_t i = 0; i < nargs; i++) {