Omr: `comptest` fails to build on `Z`

[rbanerjee]

Trying to build comptest on zlinux_s390xgenerates the following error -

[ 92%] Built target jitbuilder
[ 96%] Built target tril
[ 96%] Built target omrGtest
Linking CXX executable comptest
../../jitbuilder/libjitbuilder.a(OMRInstruction.cpp.o): In function `OMR::Z::Instruction::Instruction(TR::CodeGenerator*, OMR::InstOpCode::Mnemonic, TR::Node*)':
OMRInstruction.cpp:(.text+0x316): undefined reference to `OMR::InstOpCode::getMnemonicName(OMR::InstOpCode::Mnemonic)'
../../jitbuilder/libjitbuilder.a(OMRInstruction.cpp.o): In function `OMR::Z::Instruction::Instruction(TR::CodeGenerator*, TR::Instruction*, OMR::InstOpCode::Mnemonic, TR::Node*)':
OMRInstruction.cpp:(.text+0x51a): undefined reference to `OMR::InstOpCode::getMnemonicName(OMR::InstOpCode::Mnemonic)'
collect2: ld returned 1 exit status
make[3]: *** [fvtest/compilertriltest/comptest] Error 1
make[2]: *** [fvtest/compilertriltest/CMakeFiles/comptest.dir/all] Error 2
make[1]: *** [fvtest/compilertriltest/CMakeFiles/comptest.dir/rule] Error 2
make: *** [comptest] Error 2

Machine specifications:

Architecture:          s390x
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Big Endian
CPU(s):                8
On-line CPU(s) list:   0-7
Thread(s) per core:    1
Core(s) per socket:    1
Socket(s) per book:    1
Book(s):               8
Vendor ID:             IBM/S390
BogoMIPS:              21881.00
Hypervisor:            z/VM 6.4.0
Hypervisor vendor:     IBM
Virtualization type:   full
Dispatching mode:      horizontal

Building on gcc 4.4.6.

Potentially related to this: https://github.com/eclipse/omr/pull/2012

Tagging the participants from https://github.com/eclipse/omr/pull/2012:
@sehirst @fjeremic @charliegracie

[dchopra001]

@fjeremic
Looks like it's due to this minumum ALS commit: https://github.com/eclipse/omr/pull/2114

There are a couple of Asserts added inside OMRInstruction.cpp that call OMR::InstOpCode::getMnemonicName(OMR::InstOpCode::Mnemonic)

This is not defined in the z codegen (yet), as we learned from https://github.com/eclipse/omr/pull/2012