Bug 1443342 - Remove XorShift128PlusRNG.h from integer-overflow sanitizer blacklisting. r=froydnj

--HG--
extra : rebase_source : 6ecedb849aa51cffc493017661025365ecdb1eb2

build/sanitizers/ubsan_signed_overflow_blacklist.txt

@@ -241,7 +241,6 @@ src:*/security/manager/ssl/md4.c
 src:*/security/nss/lib/dbm/src/h_func.c
 src:*/security/nss/lib/freebl/sha512.c
 src:*/security/nss/lib/freebl/md5.c
-src:*/XorShift128PlusRNG.h
 src:*/xpcom/ds/PLDHashTable.cpp
 
 # Hash/Cache function in Skia

build/sanitizers/ubsan_unsigned_overflow_blacklist.txt

@@ -248,7 +248,6 @@ src:*/security/manager/ssl/md4.c
 src:*/security/nss/lib/dbm/src/h_func.c
 src:*/security/nss/lib/freebl/sha512.c
 src:*/security/nss/lib/freebl/md5.c
-src:*/XorShift128PlusRNG.h
 src:*/xpcom/ds/PLDHashTable.cpp
 
 # Hash/Cache function in Skia

mfbt/XorShift128PlusRNG.h

@@ -61,6 +61,7 @@ class XorShift128PlusRNG {
   /**
    * Return a pseudo-random 64-bit number.
    */
+  MOZ_NO_SANITIZE_UNSIGNED_OVERFLOW
   uint64_t next() {
     /*
      * The offsetOfState*() methods below are provided so that exceedingly-rare