r300912: compile failure in world: event.cc:438:45: error: invalid suffix on literal;

Recent CURRENT r300912 fails to buildworld with the error shown below:

[...]
cc   -O2 -pipe -O3 -O3 -pipe -march=native  -DNDEBUG -MD  -MF.depend.alias_skinny.o
-MTalias_skinny.o -std=gnu99 -fstack-protector-strong -Wsystem-headers -Wno-pointer-sign
-Wno-empty-body -Wno-string-plus-int -Wno-unused-const-variable -Wno-tautological-compare
-Wno-unused-value -Wno-parentheses-equality -Wno-unused-function -Wno-enum-conversion
-Wno-unused-local-typedef -Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter
-Wno-parentheses  -Qunused-arguments
-c /usr/src/lib/libalias/modules/skinny/../../../../sys/netinet/libalias/alias_skinny.c
-o alias_skinny.o --- all_subdir_lib/libdevdctl --- --- event.So
--- /usr/src/lib/libdevdctl/event.cc:438:45: error: invalid suffix on literal; C++11
requires a space between literal and identifier [-Wreserved-user-defined-literal]
snprintf(timebuf, bufsize, " timestamp=%"PRId64,