[MoarVM Bump] Brings 11 commits

MoarVM bump brought: MoarVM/MoarVM@2018.03...2018.03-11-g67056c204
67056c204 Fix optimization of zombie conditional causing segfault
a3bd17b4f Fix windows1252/1 decodestream replacement with last pos repl.
dd2072da1 Fix missing `:` in ChangeLog, causing website not to generate right
41711ff26 Make sure shiftjis_codeindex.h is added to Makefile.in
5a407295f Fix buffer overflow in shiftjis encode
a14ecc124 Implement ShiftJIS encode support
9ce054d09 Update generate_encoding_codetables.p6 to gen shiftjis switch
b03c8fdf9 Have UCD-Download also download Shift-JIS code index
2bd691551 Fix segfault on concurrent array access while resizing
63348dce0 insert null-out-instructions before prof_enter
ed4ed0e94 metadata for ReentrantMutex and Semaphore

tools/build/MOAR_REVISION

@@ -1 +1 @@
-2018.03
+2018.03-11-g67056c204